Wrench (Open/Box) PARTNER PA-3020 — 20 mm, Cr-V steel

Combined open/box wrench PARTNER PA-3020 sized 20 mm, made from chrome-vanadium (Cr-V) steel, is a single-piece hand tool intended for tightening and loosening fasteners with a 20 mm head. Its one-piece construction delivers consistent torque transfer and improved durability compared with multi-part designs. The wrench is suitable for workshop, automotive and general maintenance tasks where a reliable 20 mm wrench is required.

Advantages

The 20 mm combined open/box design provides versatility for working in both exposed and confined fastening points. Manufactured from Cr-V steel, the tool resists wear and maintains edge integrity under repeated use. The single-piece construction reduces the risk of joint failure and ensures predictable torque transmission. The box end offers improved grip on hex heads while the open end allows quick placement on fasteners without full rotation.

Suitable for

• Automotive maintenance and repair where 20 mm fasteners are common
• Mechanical assembly and disassembly of machinery
• General household repairs and furniture assembly involving 20 mm bolts
• Workshop tasks requiring a durable 20 mm wrench

Key specifications

• Tool type: combined open/box wrench
• Nominal jaw size: 20 mm
• Material: chrome-vanadium (Cr-V) steel
• Construction: single-piece forged/formed metal
• Ends: one open end and one box (ring) end

How to use

Select the 20 mm combined wrench and position the open or box end over the fastener head. Use the box end for maximum contact and reduced risk of rounding the fastener, especially for high-torque operations; use the open end for quick placement and work in tighter spaces. Apply steady force in the intended direction of rotation and avoid sudden impacts or using the wrench as a hammer. Inspect the tool and the fastener before use to ensure correct seating and safe operation.

Usage recommendations

For safe and effective performance, keep the wrench clean and free of oil or debris to maintain grip. Avoid using excessive force beyond the mechanical limits of hand tools; if higher torque is required, use an appropriate sized tool or torque wrench. Store the wrench in a dry place to minimize corrosion and periodically check for wear or deformation before critical tasks.