Available as a "pulley" style where the shank diameter is not reduced or as an "extension" style with reduced shank
Extension taps provide additional length for longer reach applications; however, the shank diameter is reduced to allow tapping beyond the ground thread length of the tap
Pulley taps are used for tapping the hubs of pulleys for oil caps or set screws; however, the shank diameter is not reduced as it is with extension taps
Designed for use in wide variety of materials in both through hole and blind hole applications