Manufactured from hardened and tempered Chrome Vanadium steel with an electrodeposition finish. Ultra-smooth, flip reverse double end ratchet spanner combining go-through socket and 1/4""Hex drive. Go-through sockets for use on fixings with extended studs and adjusting screw locknuts. Lock-on™ sockets enable use on up to 85% rounded fasteners. Low profile sockets and bits, ideal for limited access applications. Supplied in storage case. PREMIER BLACK - One of a comprehensive range of hand tools, suitable for daily professional use. DURABLE - Manufactured from hardened and tempered Chrome Vanadium steel with an electrodeposition finish. 31PC SET - Includes sockets, bits and a double end, flip reverse ratchet spanner. GO-THROUGH - For use on fixings with extended studs and adjusting screw locknuts. LOCK-ON™ - Enables use on up to 85% rounded fasteners. LOW PROFILE - Ideal for limited access applications. STORAGE - Supplied in storage case. LIFETIME GUARANTEE*.