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1. 3-ply cutters reduces tip crack even with hard use,amd the edge of knife adopts super quality alloy material,which is applied to drilling in cold/hard metal or stainless steel plate. 2. The 25mm effective length enables this hole-saw to drill thick steel plate as well as curved face material like thick-wall metal pipes etc. 3. The abrasion reducing design heightens durability of hole-saw to great degree,besides,with lighter and faster drilling compared with previous flat-edge products.
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tct hole saw