Color:M6*50 / 20 Pieces 100% Brand New Expansion Bolts Package Includes: 20 Pcs. Material: made of durable carbon steel. Drill the hole to correct size and tap the screw into the hole then tighten up. Expansion is created by tightening a threaded bolt which draws a tapered cone expanding a sleeve against the walls of the hole. Suitable for concrete, masonry and ceiling, etc. Note: Manual measurement differences may exist. Thank you for your purchase. If you have any problems in the transaction, please contact us in time, we will do our best to solve any of your problems, hope that our service will make you satisfied.
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