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. APPLICATIONS ARE POWER TOOLS ACCESSORIES COMPOUNDS SPECIALTIES. INDUSTRIES INCLUDE AEROSPACE AOEM COMPOSITE CUTTING TOOL MANUFACTURING GENERAL INDUSTRIAL MARINE METALWORKING MRO PAINT PREPARATION PRIMARY METAL TRANSPORTATION & HEAVY EQUIPMENT WOODWORKING.