This keystone slotted screwdriver is designed to accommodate slotted screws. - The blade design widens at the shaft and tapers to the slotted tip. Tip Size / 3/8 in Tip Style / Keystone Slotted Overall Length / 13 in Shank Length / 8 in Shank Material / Steel Shank Shape / Square Handle Material / Multicomponent Standards / ASME B107.600