Sonic wrenches are made from Chrome-Vanadium steel for strength and resistance to the elements and chemicals. Double Open-end wrenches offer two sizes one wrench, covering 6mm to 32mm over ten wrenches. The 13mm Injection Pump wrench relives the frustration when reaching the fastener is a must. Eight 75-degree offset box-end wrenches include sizes from 6mm to 22mm, and an 11mm flare wrench offers a flexible head on one end. Finally completing this set are seventeen Combination Wrenches from 6mm to 22mm.