Facom Protwist screwdrivers offer good torque transmission and fast screwing speed.They have a natural grip and excellent comfort which leads to - Efficient pre-tightening, Comfortable high torque action and Easier torque transfer. The strong, comfortable grip is made from soft polyurethane with a polyamide core for high resistance to: Impact and stress, abrasion and chemical agents for long-lasting performance.five handle sizes are designed to suit the tip size - Small sizes have a long, thin body for a faster screwing action. Larger sizes have a wider gripping surface for a firmer hold and maximum torque transfer.The Silicon carbon steel blades are very strong and have excellent resistance to bending. While the black tip means there is no risk of flaking and guaranteed accuracy it retains the dimensional accuracy of the machined tip and means no chromium deposits in the environment and no weakening due to hydrogen release during the chromium plating process.