uxcell 1/4-inch x 4mm T20 S2 Steel Torx Security Screwdriver Bits 10pcs Weight: 114g; Product Name: Torx Security Screwdriver Bits; Package Content: 10 x Torx Security Screwdriver Bits Main Material: S2 Steel; Overall Size: Length:50mm/2" Head Type: T20; Main Color: Silver Gray Drive Type: Torx Security; Features: Hex Shank, Magnetic Point Diameter: 4mm/ 0.16"; Hex Shank Diameter: 1/4"