Adjustable Double-Ended Box Wrench GEKO 15–27 mm / 5–15 mm CrV

The Adjustable Double-Ended Box Wrench GEKO 15–27 mm / 5–15 mm CrV is a dual-range tool designed to turn hex nuts and bolts across two size ranges without swapping wrenches. Constructed from chrome-vanadium (CrV) steel, the wrench combines strength and wear resistance for regular workshop use and on-site repairs. One boxed end adjusts to fit fasteners from 15 to 27 mm while the opposite boxed end covers 5 to 15 mm, providing versatility for mechanics, assemblers and maintenance technicians.

Advantages

The compact dual-ended design reduces the number of individual tools required and speeds up work by offering two adjustable boxed heads in a single piece. Chrome-vanadium construction improves durability and resistance to abrasion and deformation during repeated use. The boxed ends deliver a secure contact with fasteners to minimize rounding, and the adjustment scale allows quick selection of the correct grip within each range.

Suitable for

• Mechanical repairs on cars, motorcycles and bicycles
• Assembly and disassembly of machinery and equipment
• General maintenance tasks in workshops and industrial settings
• Field service and mobile repair work

Key specifications

• Material: chrome-vanadium (CrV) steel for strength and wear resistance
• Left boxed end adjustable range: 15–27 mm
• Right boxed end adjustable range: 5–15 mm
• Double-ended boxed wrench design for two-size coverage
• Finish: corrosion-resistant treatment for workshop conditions

How to use

Select the boxed end corresponding to the fastener size you need within the stated ranges. Place the boxed end over the nut or bolt head, adjust the internal setting until the fastener is fully engaged, and apply steady turning force. For stubborn or corroded fasteners, ensure correct alignment and use controlled force to avoid slipping. After use, clean off dirt and debris and store the wrench in a dry tool case or rack to maintain condition.

Usage recommendations

Use the wrench within its specified size ranges to avoid damaging the tool or fasteners. Avoid excessive impact or hammering on the boxed ends; for seized fasteners, apply penetrating oil and allow time to penetrate before attempting to turn. Regularly inspect for wear or deformation and replace the tool if the boxed ends no longer provide a secure fit.