Uxcell a16010600ux0534 1/4" Hex Shank T30 Security 5 Point Star Screwdriver Bits Weight: 120g; Product Name: Star Security Screwdriver Bits; Package Content: 10 x Star Security Screwdriver Bits Main Material: S2 Steel; Overall Size: 6 x 50mm/0.24" x 2"(D*L); Head Type: T30 Main Color: Gray; Drive Type: Pentacle Features: Magnetic; Battery Included: No Hex Shank Diameter(Middle Part): 6.3mm/1/4"; Tip Size: 5mm/0.2"