Ko-ken 2726ZB-3/8 Z-Series 1/4" Body 3/8" Sq. Dr. Flex Ratchet QR 72 Teeth — Ratchets & Wrenches product photo
Ko-ken 2726ZB-3/8 Z-Series 1/4" Body 3/8" Sq. Dr. Flex Ratchet QR 72 Teeth — additional product view
Ratchets & Wrenches

Ko-ken 2726ZB-3/8 Z-Series 1/4" Body 3/8" Sq. Dr. Flex Ratchet QR 72 Teeth

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The Ko-ken 2726ZB-3/8 is a Z-Series flex-head ratchet from Ko-ken, precision-engineered in Japan for exceptionally low backlash, a compact head size, and high torque performance. It features a 1/4-inch body with a 3/8-inch square drive, a quick-release (QR) button that securely retains sockets and accessories, and a 72-tooth gear that delivers a fine 5-degree arc swing for superior control in tight, confined spaces. The flexible head pivots to access fasteners at an angle, making it ideal for automotive, mechanical, industrial, and maintenance work where clearance is limited. The ratchet has an overall length of 114 mm (4.5 inches / 6.3 inches with head), weighs approximately 0.11 kg, and is constructed from alloy steel with a black finish. Suited for professional mechanics and DIYers who need precision, access in confined spaces, and smooth ratcheting action. Brand: Ko-ken; Model: 2726ZB-3/8; Drive Size: 3/8-inch square drive; Body: 1/4-inch; Tooth Count: 72; Arc Swing: 5 degrees; Head Type: Flex; Overall Length: 114 mm; Weight: 0.11 kg; Material: Alloy Steel; Finish: Black; Quick Release: Yes; ASIN: B0BXCWSS5Z.

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Choosing Ratchets & Wrenches

How do I pick the right ratchet drive size?

Choose the drive size by the fastener size and torque you need — 1/4-inch for small fasteners and tight spaces, 3/8-inch for general automotive and mechanical work, and 1/2-inch for high-torque lug nuts and large bolts. A higher tooth count means a smaller swing arc, which is useful in confined areas.

When do I need a flex-head or swivel ratchet?

When fasteners sit at an angle or in recessed areas where a fixed-head ratchet cannot align. A flex or swivel head lets you keep the handle clear of obstructions while the socket stays on the fastener, improving access in tight engine bays and assemblies.