The Facom 'J' extensions have a 3/8in Drive to fit 3/8in sockets or ratchets. Their extra length means that hard-to-reach bolts and other fasteners are easily accessed for loosening or tightening. The extensions are finished in polished chrome. Performance conform to ISO 3316, DIN 3123 and NF ISO 3316. The FCMJ210 extension has the following specifications Length 125mm. Weight 127g.