This shank has a 1/4 inch diameter to fit 1/4 inch collet chucks or drill chucks. It also has a 1/4-20 external thread to fit Roloc™ Disc Pads with 1/4-20 internal threads.
Backup pad designed to support 3M™ Roloc™ 3 inch diameter abrasive discs. This pad has a 1/4-20 INT thread which allows it to be mounted directly to tools with 1/4-20 EXT threaded shafts or use with Roloc™ shank to fit collet chuck tools.
Backup pad designed to support 3M™ Roloc™ 3 inch diameter abrasive discs. This pad has a 1/4-20 INT thread which allows it to be mounted directly to tools with 1/4-20 EXT threaded shafts or use with Roloc™ shank to fit collet chuck tools.