Slotted Square Shank ScrewdriverHeat-treated shank. Square shank permits the usage of a wrench for added leverage. Cross ground for consistent fit. Tip is precise width and thickness to fit screw slot. 4 sided handle prevents roll away. Handle Material: Plastic; Handle Type: Ergonomic; Overall Length: 10 5/16 in; Shank Diam: 5/16 in; Shank Length: 6 in; Shank Material: Alloy Steel; Shank Type: Square; Tip Type: Slotted; Tip Width: 5/16 in; Weight: 0.22 lb.