Product: EasyMech Set of M6 X 12MM Socket Head Cap (Allen) Bolt and Nut Brand: EasyMech Allen Key size Required: 6 mm. Hardness is 2 times higher than copper, and 10 times higher than aluminum. Hexagon angular groove depth of more deep, will not slip and hence more convenient for hand tightening.
Brand: EasyMech. Type: M4 (4.0 mm Bolt Diameter) Bolt Head Outer Diameter: 6.8 mm. Bolt Head Style: Round. Bolt Drive Style: Hex Socket. Color: Grey. Nut Type: Hex. Allen Key size Required: 3 mm. Hardness is 2 times higher than copper,10 times higher than aluminum.