1/4″ Hex Shank

Item Number Range Steps
TH-ST-HX3/8.1/4~3/4 1/4″ to 3/4″ 9 Steps
TH-ST-HX3/8.3/16~7/8 3/16″  to 7/8″ 12 Steps
TH-ST-HX3/8.1/4~1-1/8 1/4″  to 1-1/8″ 3 Steps
TH-ST-HX3/8.1/4~1-3/8 1/4″ to 1-3/8″ 6 Steps

3/8″  Round Shank

Item Number Range Steps
TH-ST-RD3/8.1/4~3/4 1/4″ to 3/4″ 9 Steps
TH-ST-RD3/8.3/16~7/8 3/16″  to 7/8″ 12 Steps
TH-ST-RD3/8.1/4~1-1/8 1/4″  to 1-1/8″ 3 Steps
TH-ST-RD3/8.1/4~1-3/8 1/4″ to 1-3/8″ 6 Steps