Unior 1640/1DP-US Chain Tool Pliers 240 mm

The Unior 1640/1DP-US chain breaker pliers open chains in the workshop for cleaning, replacement or installation checks. Designed for those working on bikes with derailleur gears.

• Opens most derailleur chains currently in production
• Drop-forged steel, fully hardened and tempered, for workshop use
• Induction-hardened driving pin for wear resistance
• Double plastic-coated handles for a more comfortable grip
• Not suitable for BMX chains and many single-speed chains with a 1/8″ (3.3 mm) roller

Technical specifications

• Item code: 1640/1DP-US (SKU 624914)
• Dimensions: 240 × 29 × 13 mm
• Weight: 426 g
• Material: premium flex plus carbon steel
• Manufacturing process: drop-forged, fully hardened and tempered; induction-hardened driving pin
• Finish: trivalent chrome plating to ISO 1456:2009
• Handles: double-dip plastic coating
• Chain compatibility: most derailleur chains currently in production
• Not compatible: chains with a 1/8″ (3.3 mm) roller, typically found on BMX and many single-speed bikes
• Intended use: opening chains in the workshop for cleaning, replacement or installation checks

Unior was founded in 1919 in Zreče, in present-day Slovenia, where it is still based. For bicycle care, it makes tools, repair stands and wheel equipment. Its name, adopted in the 1970s, comes from the expression “universal tools” and reflects its roots in metalworking.