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Starrett A4 Hole Saws Arbor - 14-30mm Hex Shank Arbor Screw Thread with 6.35mm High-Speed Steel Pilot Drill - Quick Change Mandrel
Starrett CSC20 Hex Shank Multi-Material Bi-Metal Cordless Smooth Cutting Hole Saw 20mm - Screwfix
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Bi-Metal Hole Saw Sets 3pcs 20mm 25mm 32mm M42 Holesaw Kit Circular Hex Shank Thin Wall Impact Hole Cutter Drill Bit with Arbors for Wood Metal Pvc Copper Plaster Steel Plate Drywall