Flat spanner Proxxon 12 x 13 mm

The Proxxon Flat spanner 12 x 13 mm is a compact hand tool with two open-ended jaws sized 12 mm and 13 mm for tightening and loosening nuts and bolts. Its slim profile and precision-machined ends make it suitable for tasks that require access in narrow spaces, including mechanical, automotive and general maintenance work. The design emphasizes a balance of durability and control for workshop and home repair use.

Advantages

This flat spanner offers two commonly used metric sizes in a single, space-saving tool. The thin, flat body provides access to tight clearances where bulkier wrenches cannot reach. Precision-cut jaws ensure a secure grip on hex fasteners, reducing the risk of rounding. Constructed from hardened steel, the tool is built for repeated use and resistance to everyday wear.

Suitable for

• Tight-space mechanical and assembly work
• Automotive maintenance and light repairs
• Appliance and equipment maintenance
• Home workshop tasks and DIY repairs

Key specifications

• Jaw sizes: 12 mm and 13 mm
• Type: open-ended flat spanner
• Profile: thin, flat design for narrow access
• Material: hardened steel construction
• Use: manual operation, non-ratcheting

How to use

Select the jaw size that corresponds to the nut or bolt head. Place the open end over the fastener so the flats of the jaw align fully with the flats of the nut to maximize contact. Apply steady manual force to turn the fastener, keeping the spanner aligned with the axis of the bolt to avoid slippage. For confined spaces, angle the tool to obtain the required turning motion while maintaining a firm grip.

Usage recommendations

Inspect the fastener and the spanner jaws before use; avoid using a worn or damaged wrench on rounded or stripped heads. Do not use the flat spanner as a hammer or pry bar. For stubborn or corroded fasteners, apply penetrating lubricant and use appropriate safety practices, including eye protection and controlled force to prevent injury or tool damage.