Amtech S5970 4 Piece 10mm Closed Hook Bolts

Amazon

HEAVY DUTY: These heavy duty 8mm 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 13mm SPANNER REQUIRED: A 16mm clearance hole is needed for the expansive bolt and the M16 thread requires a 10mm spanner to tighten the expansion nut, Weight: 1.1464037624 Pounds, Manufacturer: DK Tools

Zoro Tools

HEAVY DUTY: These heavy duty 8mm 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. 13mm SPANNER REQUIRED: A 16mm clearance hole is needed for the expansive bolt and the M16 thread requires a 10mm spanner to tighten the expansion nut.

ManoMano

For secure and reliable fixing of items and fixtures to masonry, concrete, brick, block etc. Requires an 16mm hole for the expansive bolt. M10 thread requires 16mm spanner to tighten expansion nut. Internal eye diameter: 30m. Not suitable for applications requiring Building Inspector/Local Authority approval.