Klein Tools Hex Bit Socket Set 65233HEX 32 Piece SAE Metric (1 4 3 8 1 2 Inch Drive Knurled Chrome Sockets MODbox Storage Organizer Case Kit) SDS Plus Drill Bits This premium FLEXVOLT® power source This premium FLEXVOLT® power source resolves that bottleneck by utilizing revolutionary dual voltage flexible technology that automatically changes voltages depending on which tool it is clicked into advanced thermal heat treatment process that hardens the carbon steel core to significantly resist tip dulling while maintaining structural ductility to eliminate catastrophic shattering under high trade loads (7) 1 4 Inch Drive SAE Hex Bit Sockets (5 64 inch Each socket incorporates deep base knurling to maximize manual finger traction when starting fine threaded fasteners by hand