This new ergonomically designed Rennsteig Master Pipe wrench (Swedish pattern) has 45° angled precision hardened jaws with separately induction hardened teeth and quick adjustment. The teeth are in opposite direction and give you a better grip on all sizes of pipes. The complete tool is forged (chrome vandium steel) and oil-hardened. According to DIN 5234. It's a must for every plumber. – Time-saving and precise quick adjustment – One-hand operation – Guard prevents operators´ fingers being pinched – Adjustment of opening width by pushing a button directly on the workpiece – No unintentional shift of the jaws – High wear resistance due to the additionally hardened teeth – Maximum power transmission by drop forged and hardened handles (Dip-Coated) – Integrated crush protection – Industrial quality Made in Germany by Rennsteig. Check out the Manufacturers Instruction video under http://youtu.be/-lIJrGMsHhI This is an industrial tool, not a DIY-quality item.