Irwin
Double set screw with allen wrench. Recommended for all 1/4-inch round shank drill bits requiring extra reach. Follows 5/8-inch & larger bits through hole, 1/4-inch shank. Only fits round-shank speedbor bits.
Century Drill And Tool Screwdriver Bit Slotted 5/16″ Tip 6″ Length
Diamond Plus Hole Saw, 1-In.
K-T Industries Cutting Wheel 4-1/2" X 1/8" X 7/8"
Century Bit Holder Magnetic 1/4″ Insert Hex 1/4″ Shank Hex
K-T Industries Cutting Wheel 4-1/2" X 1/16" X 7/8"