7-Piece High-Speed Steel Triangular Shank Step Drill Bit Set with Center Punch for Woodworking

Product name: 7 support step drill and draw-groove saw drill center punching set. Packing: 7 pieces plastic bags 7 pieces plastic boxes. Material: high speed steel 4241. Surface treatment: Titanium plating. Center punch material: high speed steel chromate alloy steel thimble. Specifications: Step drill 4-12/4-20/4-32mm slotted saw drill 3/6/8mm gold center punch 1. Weight: 332g in bag and 500g in box plastic box size: 19013543mm). Application: suitable for aluminum alloy, wood, plastic drawing-groove drilling and reaming processing, Center punch can be used for mark positioning, glass breaking and so on. Material]: High-speed steel 4241. Handle]: Step drill is triangle round handle, prevent sliping. The saw and drill is a round handle. Surface treatment]: The gold is titanium coating, more wear and oxidation resistance, not rust. Product use High-speed steel 4241 material is suitable for iron plate, aluminum alloy, copper plate, wood board