• Material: Sheet metal 
• Surface finish: chrome plated according to ISO 1456:2009 
• Metal tire levers are used on wheels where mounting and dismounting the tires with plastic  tire levers is difficult or impossible. 
• Unior's 1657/2A tire levers can be stuck behind the spoke, with help of the hook on the end  of the lever. 

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.