Item # 4935055 Performance Threading System Drive Tools Features: No more set-screw needed, simply twist to insert and remove die Ergonomic handles for more control and comfort when threading Drive with die stock, 3/" ratchet or t-handle included Drive with adjustable jaw Die adapter accommodates standard 1" hex dies Item #4935056 Tap Type Plug Includes Taps, No. 4 - 1/2 in. NC & NF Pitches Measuring System SAE Wt.1.60 lb Item #4935057 Tap Type Plug Includes Taps, 3 - 12mm w/Coarse and Fine Pitches Measuring System Metric Wt. 1.60 lb Item #4935060 SAE 1" Hex Dies - No. 4 to 1/2" with NC and NF Thread Pitches Self-Aligning dies start and thread straight every time More steel at critical points for additional strength Item #4935061 Metric 1" Hex Dies - 3mm to 12mm with Course and Fine Thread Pitches Self-Aligning dies start and thread straight every time More steel at critical points for additional strength