Manufactured from heat treated and hardened Chrome Vanadium steel with a fully polished finish. Extension bars feature cut-away tips allowing sockets to be driven with shaft offset of up to 10° and deep knurling on shafts for extra grip when spinning off fixings. Spring-ball socket retainers. Features & Benefits:Manufactured from heat treated and hardened Chrome Vanadium steel with a fully polished finish.Extension bars feature cut-away tips allowing sockets to be driven with shaft offset of up to 10° and deep knurling on shafts for extra grip when spinning off fixings.Spring-ball socket retainers.Contents: Extension Bars; 75, 125, 250mm, Adaptors; 3/8"(F) - 1/2"(M), 3/8"(F) - 1/4"(M), Universal Joint.Lifetime guarantee*.Model No. AK7690 Specifications: Model No AK7690 Brand: Premier Contents: Extension Bars; 75, 125, 250mm, Adaptors; 3/8"(F) - 1/2"(M), 3/8"(F) - 1/4"(M), Universal Joint Drive: 3/8"Sq Nett Weight: 0.57kg