Hex Key with Ball End Wiha 369B SW 5.0 – Set of 10, model 03872

Wiha 369B SW 5.0 hex key set (10 pieces) is a selection of L-shaped hex keys with a 5.0 mm nominal size and ball-end geometry designed for working with internal hex (Allen) fasteners in confined or angled positions. Each key combines a straight short arm for higher torque and a long arm with a ball end that permits engagement at an angle, enabling access to fasteners that are partially obstructed or recessed. The tools are intended for mechanical, assembly and maintenance applications where precise fit and angled entry are required.

Advantages

The ball-end design allows the hex key to engage the screw from an angle, improving access in tight spaces while maintaining a secure fit. The L-shaped form provides leverage on the short arm for high-torque operations and a long arm for reach. Manufactured by a specialist hand tool brand, these keys are produced to consistent dimensional tolerances to ensure proper seating in hex sockets and reduce wear. The set format ensures multiple keys are available for repeated or batch work.

Suitable for

• Assembly and disassembly of machines and equipment with internal hex fasteners
• Maintenance tasks in confined spaces where straight entry is not possible
• Mechanical workshops, service technicians, and production lines requiring quick access tools

Key specifications

• Nominal size: 5.0 mm
• Ball-end geometry on the long arm for angled engagement
• L-shaped hex key design with short and long arms for torque and reach
• Set quantity: 10 pieces

How to use

Select a 5.0 mm key from the set and insert the hex end fully into the fastener socket to ensure correct engagement. For maximum torque, use the short arm as the driver and keep the long arm aligned to avoid cam-out. When a straight approach is not possible, use the ball end on the long arm to engage the fastener at an angle within the design limits of the ball geometry. Apply steady, controlled force and avoid excessive bending of the long arm to prevent deformation.

Usage recommendations

Inspect the hex socket and the key for damage before use, and ensure the correct nominal size to avoid rounding fastener corners. Use the short arm for high-torque loosening or tightening and the long arm when reach or angled engagement is required. Store the keys in a holder or tray to keep the set complete and protect the tips from wear.