Tools with verified quality
Unior Hand tools are in compliance with the European and global quality standards. Unior is striving to assure the high quality of hand tools also as a fully authorized CEO (European Tools Committee) member.
Unior was among the first manufacturers of hand tools in Europe to receive ISO 9001 quality certificate. In 1994, the company received ISO 9001 quality certificate for the development, production and marketing of hand tools, sheet metal housing for hand tools and mechanical processing of forging parts.
Unior tools are in compliance with DIN standard. Since 1991, the tools for working at high voltage also proudly hold VDE certificate, issued by VDE Institute- "Pruf und Zertifizierungsinstitut" from Offenbach in Germany.

Master Chain Tool

The most advanced chain tool in our range. Featuring machined body & precisely made spindle threads for smoothness and ease of use. Large handle gives extra leverage and breaks the chain easily. Master Chain Tool features floating chain support for perfect positioning and support of any chain. Works with all derailleur chains from 6–12-speed, is compatible with SRAM AXS chain and works with 1/8 single speed chains. It also supports Campagnolo’s 11- and 12-speed chain peening. Tool comes with three different interchangeable chain supports; preinstalled is a single link support, available are also a wider double link chain support for extra grip on the chain and a dedicated SRAM AXS chain support. Hidden compartment at the in body of the tool features an additional replacement chain pin.

Comes with:
Long and short derailleur chain support (compatible with 6–12-speed derailleur chains)
Dedicated SRAM AXS chain support
Campagnolo chain pin blocker
Replacement chain pin

Compatible with:
All derailleur chains from 6–12-speed
SRAM AXS flat top chain
Most single speed 1/8 chains
Campagnolo 11- and 12-speed chain peening