X-Lock Backing Pad, Medium Harness, 4.5-In.

4-1/2", x-lock, backing pad, medium hardness, works with bosch high quality zirconia fiber discs, features snap on mounting & grinder lever wheel release, tool free disc swap features an audible snap when mounted, without a spanner wrench or a flange nut, application focused ideal for metal surface finishing, weld blending & rust removal, precision manufacturing optimized pads for less vibration & improved material removal speed, x-lock abrasive sanding pads are not backward compatible with standard 7/8" arbor mounts.