Proto

Proto J4983 13-piece hex key set with long arm design. Long arm reaches deep hex socket access during mechanical assembly work. Bundled set covers common hex key sizes for machinist and service...

Proto J4986 18-piece hex key set. Bundled set covers expanded hex key size range vs 13-piece alternatives. Used by machinists, mechanics, and service technicians during mechanical assembly and...

Proto J4990-6M hex socket bit at 3/8 inch drive with 6mm tip. Metric socket-mounted hex bit allows ratchet-driven hex fastener service during international mechanical assembly work. Used in service...

Proto J4990-7ST 7-piece short hex bit socket set at 3/8 inch drive. Short bit length fits tight clearance hex fastener access where standard length bits cannot fit. Bundled set covers common hex...

Proto J4990-7XL 7-piece extra long hex bit socket set at 3/8 inch drive in SAE sizes. Extra long bit reaches deep hex socket access during mechanical assembly work. Bundled set covers common hex...

Proto J4990-SMXL 6-piece hex bit socket set at 3/8 inch drive. Bundled set covers common hex sizes for service technician tool kits across automotive and mechanical assembly work. Socket-mounted bits...

Proto J49901/4 hex socket bit at 3/8 inch drive with 1/4 inch tip. Socket-mounted hex bit allows ratchet-driven hex fastener service during mechanical assembly work. Used in service technician tool...

Proto J49901/8 hex socket bit at 3/8 inch drive with 1/8 inch tip. Socket-mounted hex bit allows ratchet-driven hex fastener service during mechanical assembly work. Used in service technician tool...

Extra Long Hex Socket Bits, 3/8 in Drive, 1/4 in Tip

Proto J49903/16 hex socket bit at 3/8 inch drive with 3/16 inch tip. Socket-mounted hex bit allows ratchet-driven hex fastener service during mechanical assembly work. Used in service technician tool...

Proto J49903/8 hex socket bit at 3/8 inch drive with 3/8 inch tip. Socket-mounted hex bit allows ratchet-driven hex fastener service during mechanical assembly work. Used in service technician tool...

Proto J49905/16 hex socket bit at 3/8 inch drive with 5/16 inch tip. Socket-mounted hex bit allows ratchet-driven hex fastener service during mechanical assembly work. Used in service technician tool...