HHIP 2205-0312 5/16 x 3/4 x 4-1/2 Inch Right hand Cut-Off Tool Holder Holder Size 5/16 x 3/4 x 4-1/2"; Cut-Off Blade Size 3/32 x 1/2" Blade not Included Accurately machined and carefully heat-treated, these tool holders feature a relieved cutter bit hole to assure proper seating of tool bits, thereby reducing breakage. These holders are for use with High speed steel tool bits RH Offset; For Use With Cut-Off Blades