MPI 3 bolt aluminium Steering wheel Quick Release adapter KEY FEATURES: SFI Tested and approved; SFI 42.1. “PLDP” Technology: Push Lock Double Pins Hard coated aerospace 6061-T6 aluminum construction Black /Anthracite anodized finish No play Ergonomic designed release collar QR SPECS: 3x 5/16 (5/8 long) button head allen bolts included Bolt Pattern : 3 bolt (Standard US Bolt pattern) Double safety pin + hard coated aluminum spacer CNC machined slots for max weight reduction Coil collar retainer MPI + SFI Logo lasered Fully disassemblable for maintenance SPLINE SPECS: 19 tooth design Length:3.5 Outer OD: 1 Inner OD: 0.75 Welds over a 3/4 OD steering shaft