Mechanical models use an engraved scale and a multi-step adjustment (often a quick/three-step selector) and give audible feedback when the set torque is reached. Digital models show torque numerically on a backlit display and provide preset torque slots for quick selection and clear readouts.
Tips or heads are commonly made from alloy steel, while bodies are typically metal or aluminum-alloy. Some digital-handle models list plastics such as ABS and TPE for the grip or outer housing.
Mechanical screwdrivers typically use an audible “click” and an auto‑slip/over‑torque reminder to signal when the set torque is reached. Digital models add higher stated accuracy (around ±2%) and provide real‑time and peak torque readouts to help monitor and avoid over‑tightening.
Most kits use a 1/4" drive and include multi‑bit assortments such as slotted (flat), Phillips, hex, and Torx. Many torque kits are sold as 12‑bit sets and commonly include a small case or extension accessories.
Digital models typically include a backlit display, preset torque slots (often eight presets), real‑time and peak measurement modes, and on some units the ability to store many session values (listed as up to 500 sets). Several digital screwdrivers also use quick‑release heads to simplify bit changes.
Weights listed for models range from about 1.29 to 1.74 pounds, indicating they are compact, handheld tools that are easy to carry for field or on‑site electrician work.
