2pcs HSS 6542 High Speed Steel Hole Saw, Hole Saw for Cutting Wood, Plasterboard, Plywood, Aluminum, Iron Sheet, Suitable for All Drill Bits with 7mm Chuck Style, Specification and Size: 2 pieces, 13mm opening diameter, 5mm positioning hole diameter, 7mm shank diameter HSS6542 high speed steel hole opener stainless steel metal hole drill iron sheet aluminum alloy punching HSS drill bit Features: 1. The fully ground teeth are sharp and wear-resistant, and the center positioning and drilling are accurate. 2. The stable triangular shank clamping is more stable. The tail of the hole saw is designed with a hexagonal shank, which is suitable for hand drills and bench drills. 3, complete and sufficient specifications, widely applicable Hole depth: 15 mm, the hole saw is suitable for cutting wood, plastic, plasterboard, plywood, sheet metal and aluminum alloys The hole saw body has ventilation holes for easy chip discharge Uses: Drill holes for home wiring, tables for recessed sockets and other decorative work. A hole saw should always be in the toolbox