Greenlee DDKIT-1-68 68 piece electrician drill driver bit kit. The kit includes the bit types and sizes most used by professional electricians. With everything in one place, there"s no need to carry multiple bit kits or buy individual bit sets to create the right combination. With the new electrician’s drill driver kit, everything is all together right there when you need it. All the bits are professional grade and meet or exceed ASTM standards. The masonry drills have a hardened shank that tis hammer drill rated for better impact driving. The high speed drills are titanium nitride coated, so they last longer and self-center so they don"t walk when drilling.