8 Piece 6mm closed hook bolts

HEAVY DUTY: These heavy duty 6mm closed hook bolts have a zinc passivated finish for maximum protection. VERSATILE: They are ideal for secure and reliable fixing of items and fixtures concrete, stone and brickwork. 10mm SPANNER REQUIRED: A 12mm clearance hole is needed for the expansive bolt and the M6 thread requires a 10mm spanner to tighten the expansion nut.