Features and Benefits: Special 140mm length for proper reach; All 3 sizes needed for this application; All with 1/2" square drive bit holder; All steel construction; Bit holders are bright nickel finish; 140mm long wrenches service most VW & Audi headbolts. Sizes include 10mm & 12mm Triple-Square "XZN" 12-Point & #9 Ribe/Poli-drive. Use with 1/2" square drive tools.