Why choose our 20-Piece Long Ball End Hex Bit Socket Set?. Chamfered bit ends allow for smooth insertion and reduced wear on fasteners. Size: 4mm,4.5mm,5mm,5.5mm,6mm,7mm,8mm,9mm,10mm,1/8in.,5/32in.,3/16in.,7/32in.,1/4in.,9/32in.,5/16in.,3/8in.,3mm Set or Single Item: Set Socket Type: Standard Drive Type: Hex/Allen.