Bestech QUQU BG57A-4 14C28N Blade G10 Handle Button Lock Folding Knife

The Bestech QUQU BG57A-4 represents a refined approach to compact folding knife design, engineered for those who demand precision and reliability in their everyday carry. Built around a 14C28N stainless steel blade with a professional black PVD finish, this knife delivers excellent edge retention and corrosion resistance in a lightweight package weighing just 44 grams. The G10 handle in striking purple provides superior grip security and durability, while the steel clip ensures reliable pocket carry. Featuring a ceramic ball bearing deployment system, the QUQU opens with smooth, consistent action that remains responsive over extended use. The button lock mechanism offers intuitive one-handed operation and secure blade retention. At 5.47 inches overall length with a 3.27-inch closed profile, this knife balances accessibility with discretion. The 2.20-inch blade with 3.0mm thickness is optimized for detailed cutting tasks while maintaining maneuverability. Designed by Gogo, the QUQU BG57A-4 combines thoughtful ergonomics with functional minimalism, making it an excellent choice for professionals and enthusiasts seeking a dependable mid-size folder.

 

SPECIFICATIONS

Blade Material: 14C28N
Blade Finish: Black PVD
Handle Material: G10

Clip Material: Steel
Describe: Button Lock
Handle Color: Purple

Ball Bearing: Ceramic
Overall Length: 5.47" (139 mm)
Closed Length: 3.27" (83 mm)

Blade Length: 2.20" (56 mm)
Blade Thickness: 0.118"(3.0mm)
Knife Weight: 44g
Designer: Gogo

Bestech Ququ BG57A-4 - 14C28N Spear Point Button Lock with a Purple G10 Handle

The Bestech Ququ BG57A-4 is a 44 g five-pocket folder with a 2.20 inch 14C28N spear point blade, purple G10 scales and a button lock that releases the blade to a wrist flick over ceramic bearings. Open it is 5.47 inches, closed it is 3.27 - small enough to disappear, stiff enough to cut like a bigger knife. The black pvd blade finish is a deliberate contrast against the purple purple G10 scale. More folding knives and button lock knives at EDCMALL.

14C28N on a 2.2 Inch Blade: Small Steel, Real Edge

14C28N is Sandvik's nitrogen-alloyed stainless, run at 59-61 HRC here. Nitrogen carries part of the corrosion load that chromium would otherwise have to, so the steel stays fine-grained and tough rather than gummy - which matters when a 2.20 inch blade puts all the load on a short edge. It takes a keen apex in minutes on a 1000-grit stone, resists chipping when you lever through a staple, and will not spot in a sweaty pocket. Compare it with 154CM, D2 and Nitro-V below, or browse every 14C28N knife in the store.

Why the Bestech Ququ Belongs in Your Pocket

• 2.20 inch 14C28N spear point blade at 59-61 HRC with a 2.125 inch cutting edge.
• 44 g (1.55 oz) - light enough to forget, heavy enough to feel like a tool.
• Purple G10 scales in purple with a milled grip texture and a black pvd blade.
• Button lock works from both sides and closes with one thumb.
• Caged ceramic bearings - the blade flicks out on a wrist movement, not a shove.
• 3.27 inch closed length: a true fifth-pocket knife.
• Open-backed frame so lint falls out instead of packing around the pivot.
• Deep carry steel clip keeps the clip as the only visible part.

Best Uses for the Ququ BG57A-4

• Fifth-pocket carry for office, city and travel days.
• Opening packages, mail and plastic wrap without slowing down.
• Trimming cord, paracord and zip ties at the bench.
• A spare blade in a bag, glovebox or toolkit when the main knife is elsewhere.
• A gift for someone who wants a knife but not a 'knife person' knife.

Frequently Asked Questions

What steel is the Ququ BG57A-4 blade?
Sandvik 14C28N stainless at roughly 59-61 HRC with a flat grind. Nitrogen-alloyed, fine-grained, very corrosion resistant and quick to sharpen - a sensible steel for a small working blade.

How does the button lock work?
Press the button and the plunger clears the notch in the blade tang, so the blade swings free on the bearings. It sits on both sides of the handle, so the Ququ is genuinely ambidextrous for opening and closing.

Is 2.20 inches enough blade?
For boxes, tape, cord, packaging and detail work, yes - and the spear point gives you a usable belly plus a strong tip. It is not a camp knife; it is the knife you actually have on you.

Is it legal to carry where I live?
At 2.20 inches of blade and a manual button lock it fits most sub-3 inch and manual folder rules, but knife law varies by country and city - check your local rules before ordering.

How does it carry?
Closed length is 3.27" (83 mm) and weight is 44 g (1.55 oz). That is smaller and lighter than most keyrings, and the deep carry clip leaves only the clip above the pocket line.

Sandvik 14C28N vs. Common Small Folder Steels

Steel	Typical HRC	Edge Retention	Corrosion Resistance	Toughness	Sharpening Ease
14C28N (this knife)	59-61	Good	Excellent	Good	Very Easy
Nitro-V	59-61	Good	Very Good	Better	Easy
154CM	58-61	Good	Good	Very Good	Moderate
CPM-S35VN	58-60	Very Good	Very Good	Better	Moderate
D2 Tool Steel	58-61	Very Good	Fair	Good	Moderate
8Cr13MoV	57-59	Fair	Good	Good	Very Easy

14C28N is Sandvik's nitrogen-alloyed martensitic stainless, hardened to 59-61 HRC on the Ququ. Nitrogen does part of the corrosion work that chromium would otherwise have to, so the steel stays fine-grained and tough instead of gummy - which is exactly what a 2.20 inch spear point needs, because a short blade concentrates load on a small edge. It shrugs off pocket sweat, touches up on a 1000-grit stone in minutes and resists chipping when you lever through a staple. It will not out-hold a high-vanadium super steel, and that is the trade. HRC figures are typical mill ranges, not a guarantee for any single blade.

Glossary of Key Terms

Bestech Knives
A Chinese production knife brand working with independent designers to deliver modern folders with tight manufacturing tolerances.

Ququ
Bestech's sub-2.3 inch button-lock folder: a 2.20 inch 14C28N spear point on a 5.47 inch frame, 44 g with G10 scales and 51 g with aluminium, designed by Gogo with Ostap Hel.

Gogo and Ostap Hel
The design pair behind the Ququ - Gogo for the overall form and Ostap Hel for the mechanical layout and proportions.

Spear Point
A symmetrical, single-edge profile with the point on the centreline. It pierces cleanly, keeps a usable belly and stays strong because the spine supports the tip all the way forward.

14C28N
Sandvik's nitrogen-alloyed martensitic stainless at 59-61 HRC here. Fine-grained, very tough for a stainless, highly corrosion resistant and quick to sharpen.

Button Lock
A push-button plunger that drops into a notch in the blade tang. Press it and the blade swings free; because the button sits on both sides, it works equally well in either hand.

Ceramic Ball Bearing
Hardened ceramic balls held in a steel cage around the pivot - the reason the blade flicks out with a wrist movement rather than a hard push.

Milled G10
G10 with a machined texture pattern cut into the surface. The milling is functional, not decorative: it channels water and sweat away so your grip holds.

Fifth Pocket Carry
The small coin pocket inside a pair of jeans. A 3.27 inch closed, sub-55 g folder is sized specifically to disappear into one.

Deep Carry Clip
A clip mounted high on the handle so the knife sits low in the pocket with only the clip showing.

Open-Backed Construction
A handle built without a solid backspacer, so lint and grit fall out instead of packing in around the pivot.

Flat Grind
Blade flats that taper in a straight line from spine to edge - the geometry that makes a short blade cut like a bigger one.

Who Should Buy the Ququ BG57A-4

• Buyers who want a real EDC blade that disappears in a fifth pocket.
• Anyone who prefers a button lock over a liner lock for one-hand closing.
• Office and city carriers who need something discreet and legal-ish.
• Gift shoppers after a small, sharp-looking knife that is not intimidating.
• Collectors chasing the Ququ colourways and scale materials.

Who Should Skip It

• Buyers who want one knife for camp chores and hard field work.
• Anyone who dislikes painted or coated blades and wants bare steel.
• Users with large hands - a 3.27 inch handle is a three-finger grip.
• People who need a deep finger guard for heavy stabbing work.
• Buyers who expect a super-steel edge holder; 14C28N is tough, not a wear monster.

Care & Maintenance

• Wipe the blade dry after every use - 14C28N is genuinely stainless, but pocket lint holds moisture against the steel.
• One drop of light knife oil at the pivot every two to three months, then work the button a dozen times so oil reaches the bearings.
• Blow lint out of the button lock recess and the open-backed handle channel before oiling; grit in the button is the usual cause of a sticky lock.
• Sharpen on a fine diamond plate or a 1000-grit water stone at 15-18 degrees per side; the short spear point sharpens in minutes.
• Strop on plain leather after every few weeks of use - this steel responds to frequent light touch-ups.
• Wipe painted or coated blades with a damp cloth only; solvents and abrasive polish lift the paint at the plunge line.
• Scrub the milled G10 or Ultem scales with warm water and a soft brush; the milled texture packs lint quickly.
• Keep solvents and insect repellent off Ultem and painted G10 - both can cloud or stain the surface.
• Never pry or twist with the tip; a 2.20 inch blade has very little leverage to spare.