Add on for SOG(R) multi-tool; Expands the use of the tool to include major screw types; Bit sizes--star style; Philips(R) #1, #2, #3; flathead #3, #5, #7; hex 1.5mm, 2mm; Includes 1/4 socket to hex bit driver; Dim: 4.27L; Weight: 2.7oz;SOG HXB-01 Hex Bit Accessory Kit