The 750.2 Centering Cone Adaptor increases the size of the centering cone of the HTR-1 Headtube Reaming and Facing Set. Several headset and bottom bracket standards use inside diameters. The 750 will allow use the HTR-1 with the IS integrated without cups, the low profile with cups, and the OnePointFive (1.5″) EC headset standard. The HTR-1 must have the correct cutting tool and pilot for the corresponding standard.