Teng Tools 10mm Slotted Percussion Head Power Thru Flat Screwdriver- MDT935N Percussion cap in the handle The handle has a unique ergonomically designed two component grip with greater volume to give better support, increase comfort and improved power transfer Handle is moulded around the blade to ensure it is completely straight and permits much larger wings for more torque Steel alloy blade gives 20% capacity than standard screwdrivers Lifetime gaurantee