KS TOOLS 1/4 inch Hex Bit Socket Set, 7-Piece, 2.5-8mm (911.1544)

For automotive technicians and industrial mechanics who demand reliable hex fastening, the KS TOOLS 911.1544 set delivers seven precision-machined bit sockets in a compact rail. Each 1/4-inch drive socket holds a hardened hex bit, covering metric sizes from 2.5 mm to 8 mm—the most common Allen-head fasteners on modern vehicles and machinery. The matte chrome finish resists corrosion, while the DIN 3120 / ISO 1174 drive standard guarantees a secure fit on any 1/4-inch ratchet or extension.

Key specifications

• Drive size: 1/4 inch
• Bit type: Hexagon (Allen)
• Number of pieces: 7
• Metric sizes included: 2.5, 3, 4, 5, 6, 7, 8 mm
• Drive standard: DIN 3120 / ISO 1174
• Socket material: Chrome vanadium steel
• Bit material: High-quality special steel
• Finish: Matte chrome plated
• Application: Manual operation
• Packaging: Bit rail / holder
• Measurement system: Metric

Why choose it

The set’s one-piece bit-socket construction eliminates the wobble and slippage common with separate bits and holders, transferring maximum torque directly to the fastener. Chrome vanadium sockets withstand high manual loads without deformation, and the special steel bits retain their hex profile over thousands of cycles. The included rail keeps sizes organized and instantly identifiable, reducing downtime in busy workshops.

Ideal use cases

• Removing and installing hex socket bolts on engine covers, brake calipers, and interior trim
• Assembly and maintenance of industrial equipment, bicycles, and power tools
• Professional use in automotive repair shops, manufacturing plants, and field service
• Home garage projects requiring precise hex fastener control

Good to know

Each socket is clearly marked with its size for quick selection. The 1/4-inch square drive is compatible with all standard ratchets, torque wrenches, and extensions. The set is intended for manual use only—do not use with impact drivers. Store on the included rail or in a tool chest drawer to protect the matte chrome finish. Backed by KS TOOLS’ reputation for German-engineered hand tools.