The Master Set includes both the Smart-Torq and Smart-Drive gunsmithing drivers. With ergonomic comfort grips both drivers fully integrate with the multi-purpose Force Assist driver. Smart-Torq features easy to see and set in 1-lb increments. For non-torque applications the Smart Drive will be your go to for not only gunsmithing work but any tasks around the house or shop. Smart-Drive has a free spinning cap for applying additional downward pressure and an LED light for dark spaces. Completing the set are 83 standard and metric black oxide coated gun bits. Gun bits are hollow ground and square cut for precise fitment.