General Purpose Keystone Slotted Screwdriver, Tip Size 1/4 in, Slotted, Ergonomic/ OVERALL LENGTH: 8.250 INCHES NOMINAL BLADE LENGTH: 4.000 INCHES NOMINAL TIP WIDTH: 0.250 INCHES NOMINAL SHANK SHAPE: ROUND END THICKNESS: 0.037 INCHES NOMINAL FEATURES PROVIDED: FLARED TIP SIDE AND CONTOURED HANDLE AND BOLSTER MATERIAL: PLASTIC HANDLE MATERIAL: STEEL BLADE SPECIFICATION/STANDARD DATA: 05047-ASME B107.600 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND B STYLE