The Eclipse 902-097 Pro-soft 7-Piece Torx H (Tamper-Proof) Screwdrivers are comfortable to use. Coated with cushioning rubber to ease stress on the hands. This assortment contains the most commonly used drivers for Torx H (Security/Tamper-Proof) Screws. The Bit Shape has a hollow center to fit the post Security Star H Torx Screws commonly found in electronic, automotive and appliances. Bit Head Size/Number and Shaft Size: T5H: 1 15/16"; T6H: 1 15/16"; T7H: 1 15/16"; T8H: 1 15/16"; T9H: 1 15/16"; T10H: 1 15/16"; T15H: 2 15/16". Screwdriver blade portion that is inside the hard plastic core has protruding tabs formed on it to maintain a secure fit to the handle and superior torque performance.