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Product Information Widely used for drilling holes on metal plate in the kitchen room, door structure, equipment cabinet and cable box. Precise drilling for electric boxes to smoothly assemble buttons, switches and displays. Stepped pilot drill bit design protects carbide teeth from impacting perfectly when the pilot drill bit cuts through the cutting material. Split point pilot drill bit prevents bit bouncing. Please take measures to protect your skin and eyes. Apply anti-rust oil for longer service life after use. In order to prevent chipping, please avoid making the edge of the hole opener have a severe impact when cutting materials. Hole chip flute can quickly discharge iron chips even when processing thick steel plate. It also can effectively avoid the iron filings remaining between the blade and the processed material, which will cause tool collapse and jamming. Three-edged combined tooth design, layered components cutting, low cutting resistance, fast drilling speed Can not be used on impact drills and electric hammer drills. T-shaped Angle Grinding Gear The tooth part is made of high tungsten carbide alloy steel, hardened up to HRC64-65, long service life. With tungsten carbide grit and brazing technology, hole cutter can make precise and smooth holes.