HeliCoil HEX Electrical Insertion Tools are used with Helicoil Power Tools such as Helicoil Electrical Power Drivers, Helicoil Battery Operated Power Drivers and Helicoil Pneumatic Power Tools. Helicoil Hex Installtion Tools are Easy and faster to use, Quick Changing, Available in sizes from M2 to M24 and equivalent Inch Sizes. Depth Stopper ensure perfect installation of insert till required depth. External HEX is as per DIN 3126/ ISO 1173