These Rawlplug Rawlbolt(r) Loose Bolts have the following specification: Anchor Diameter: 6mm External Diameter: 12mm Length: 55mm Fixture Max. Thickness: 10mm Hole Diameter: 6.5mm Hole Diameter in Substrate: 12mm Installation Torque: 6.5 Wrench Size: 10 Min. Hole Depth in Substrate: 50mm Min. Installation Depth: 45mm Min. Substrate Thickness: 100mm Min. Spacing: 35mm Min. Edge Distance: 53mm Pack Quantity: Bag of 5 The Rawlplug Rawlbolt(r) Loose Bolt is suitable for use in cracked and non-cracked concrete (ETA option 1), hollowcore slabs, flooring blocks and ceramics. Recommended for applications requiring fire resistance. With a three-piece expanding sleeve of maximum expansion to provide optimal load and safety of use in any substrate. The world.