End Stop shaft Collars Fits over rail assembly for precision shafting. End ... Bore Sizes: 1/2" through End Stop shaft Collars Fits over rail assembly for precision shafting.End Stop ... Collars, Single and Double Split Collars, Stainless Steel Shaft Collars, S-style Split Collars, XTH, XTB, QD, BM Style Split Taper Bushings, Ductile iron shaft collars ... of foreign trade exchange. End Stop shaft Collars