.PS-AB017-A:5-1/2"(140mm) extension for shank of 7/16"(or 3/8") arbors

.PS-AB017-B:10"(250mm) extension for shank of 7/16"(or 3/8") arbors

.PS-AB017-C:12"(300mm)extension for shank of 7/16"(or 3/8") arbors

.PS-AB017-D:18"(450mm)extension for shank of 7/16"(or 3/8")arbors