The brake calliper joint insert 3/8' 2901G-7 from HAZET is made of rust-proof, heat-resistant steel. The 3/8' square drive of the 2901G-7 also offers a ball catch groove for a secure fit on the tool and a joint for use in hard-to-reach places and to avoid interfering edges. It is suitable for rear brake calliper screw connections (SW 7mm) e.g. on BMW 3, 5 and 8 series, VW Golf 7 from 2013, AUDI A3 from 2013, ŠKODA Octavia from 2013 and OPEL.