Complete Tapping Systems Model No. Description TRS1000-U375 Tapping Arm Assembly 3/8 Cap 4-39″ Working Range Universal Toolholder TRS1000-R375 Tapping Arm Assembly 3/8 Cap 4-39″ Working Range Rigid Toolholder TRS1500-U375 Tapping Arm Assembly 3/8 Cap 12-78″ Working Range Universal Toolholder TRS1500-R375 Tapping Arm Assembly 3/8 Cap 12-78″ Working Range Rigid Toolholder TRS1000-U500 Tapping Arm Assembly 1/2 Cap 4-39″ Working Range Universal Toolholder TRS1000-R500 Tapping Arm Assembly 1/2 Cap 4-39″ Working Range Rigid Toolholder TRS1500-U500 Tapping Arm Assembly 1/2 Cap 12-78″ Working Range Universal Toolholder TRS1500-R500 Tapping Arm Assembly 1/2 Cap 12-78″ Working Range Rigid Toolholder View More