【Adjustable Aircraft Type Design】The adjustable circle hole cutter ensures clean cuts with a diameter of 30mm to 300mm. 【Fast and Precise】The alloy steel carrier has markings for quick measuring and precise cutting.< /p> 【Round and Round】Double blade design, straight round effect, smooth and burr-free cutting. 【Used for】Widely used in carpentry openings, headlight openings, plastic panel openings, DIY speaker openings, etc.