TD-HMR/HOR WOOD SCREWS are for fastening metal sheet to wood. TD wood screws able to penetrate a thick steel sheet up to 0.6mm and to the wood purlin very quickly. It drills through the metal and wood and it cuts a deep counter- thread in the wood fibres. This is a cutting action that produces an interlock that provides up to 4 times more holding power compare to nails.
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