GEARWRENCH 80066H 20 Piece Screwdriver Set Tri Lobe Handle Black Oxide Non Slip Tips Phillips Slotted Torx Maintenance Fastening Mechanical Hand Tool Siding Nails Insulated Polyethylene Sidewall Core: High density Insulated Polyethylene Sidewall Core: High density thermal foam construction retards ambient heat transfer to preserve interior ice levels Dura Tip Self Feeding Screw Point: Threaded lead screw pulls the bit through tough wood with minimal user effort while protecting against tooth fracture Black Oxide Traction Tips: High grip oxide layer bounds the precise tip tolerances to sit deep in fastener recesses and arrest tool slippage Precision Component Assembly: Installing or extracting fine electrical casing fasteners and complex industrial brackets with specialized Torx and miniature Slotted sizes