Black Wheel Locking Bolts Fit BMW E31 8 Series Z1 Z3 Z4 Models 40mm Thread alloy
Of thread and a 60 degree taper collar + key. Thread length : 40mm. 4 X M12X1.5 standard locking Bolts. Collar : 60 Degree Tapered. Key head size : 17mm + 19mm. Bolt Total Length : 65mm. 100% Money back policy in place if you are not happy.