Description:Adopting the premium material, these hexagonal tap sleeves have high hardness, excellent abrasion resistance and good durability.There is a square hole in the apron, and the square hole is inlaid with a card pad, which can make the socket have firmer clamping when working with the hand electric drill.These tap sleeves are made of tool steel, which is anti-corrosion and durable.There are different sizes of these sleeves in this set.This set is ideal for mold manufacturing, pneumatic air batch, DIY, etc.Item Name: Tap Socket SetMaterial: Tool SteelShank Type: Inner HexagonalSize Details: Socket Length: 50mm/1.97" (Approx.)Shank Diameter: 1/4 inchM4: Diameter: 4mm/0.16", Tap Side Length: 3mm/0.12" (Approx.)M5: Diameter: 5mm/0.2", Tap Side Length: 4mm/0.16" (Approx.)M6: Diameter: 6mm/0.24", Tap Side Length: 4.8mm/0.19" (Approx.)M8: Diameter: 8mm/0.31", Tap Side Length: 5mm/0.2" (Approx.)M10: Diameter: 10mm/0.39", Tap Side Length: 6mm/0.24" (Approx.)M12: Diameter: 12mm/0.47", Tap Side Length: 7mm/0.28" (Approx.)M14: Diameter: 14mm/0.55", Tap Side Length: 9mm/0.35" (Approx.)M16: Diameter: 16mm/0.63", Tap Side Length: 10mm/0.39" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.Package Includes:8 x Tap Sleeves