A C Engineers Silver bullet fasteners drop in anchor fastener 10 mm (Pack of 10 Pcs) Drop-In Anchor  (5 cm)

No expansion force - unlike plugs or anchors - you can place nearer the edge without risk of fracturing Eliminates line up problems - drill the pilot hole direct into material and substrate, Suitable for a variety of substrates - concrete, solid, perforated or hollow bricks, natural stone, marble etc New easy fix - relief thread is easier to tighten especially at a lower torque than traditional plugged fixings Cuts a thread into base material - because there is no need to insert the plug High quality self tapping concrete anchors that cut a thread directly into pre drilled pilot holes, no anchor or plug is needed. Self tapping anchors are an excellent way to fasten a wide range of material to masonry. Really easy to use. Just drill a pilot hole (see technical information below for appropriate diameter) and use a socket wrench or spanner to tighten the screw, into concrete, natural stone, solid or perforated bricks, hollow blocks etc. The anchor has a high low (aka hi lo) relief thread to aid the removal of dust and ease insertion. The threaded anchor and self tapping action allows for safe anchorage, with the substrate becoming the nut to the bolt this utilizes a tried and tested method for metals and wood to a broader selection of materials. They can be reversed and reused in the same hole as it has cut the thread. Suitable for fixing timber battens/counter battening, window/door frames, machinery to the floor, wall plates, signs etc. Brackets or handrails, ducting, satellite dishes and aerials, trunking etc. In fact anywhere a fixing to concrete or masonry is required.Product Description