High hardness and high strength alloy steel tap sleeve adapter, durable. M4 M5 M6 M8 M10 M12 M14 M16, 8 different models of tap sleeves to meet your different needs. Tap sleeve adapter with 1/4 inch hex shank universal for most pneumatic screwdrivers and electric drills. The tap sleeve is designed with a spring clip inside the square hole, which makes the clamping strong. (M4&M5 Tap Socket with Square Hole in Round Leather Circle) Tap socket widely used in mold manufacturing, industrial equipment, DIY projects, auto repair, professional mechanical maintenance work and other scenarios requiring tapping. Product Specification Item Type: Tap Adapter Material: Alloy Steel Shank Diameter: 6.35mm Total Length: 2inch/50mm Twist Tap Base Size: 3mm, 4mm, 4.8mm, 5mm, 6mm, 7mm, 9mm, 10mm Standard: M4, M5, M6, M8, M10, M12, M14, M16. Package Content 8 * Tap Adapters