The Crescent brand Driveshaft tip is a much greater fit in slotted screws, reducing tendency to cam-out(slip). All tips are vapor blasted to eliminate chipping. The exclusive tapered, torque-enhancing, cushion grip interlocks with durable core to provide a more powerful and comfortable grip. Blade Type: Mechanic's Round Tip, Style: Slotted, Blade Diameter : 5/16 -Inch by 8 mm, Blade Length : 6 -Inch by 150 mm, Overall Length : 11 -Inch by 279 mm, Handle Style: Cushion Grip, Blade/Point Size: 5/16 -Inch by 8 mm.