5pcs 16-30mm High Speed Steel Drill Set Meche Cutter for Drilling Cylindrical Saw - Gold

wear resistant high tenacity high hardness up to 63 - 65 HRC. Cutting blades by professional heat treatment and hot cutting grinding forming perfect for cutting thin materials quickly with precision. Suitable for stainless steel thin copper or aluminum plate plastic sheet etc. The spring idea offers a buffering effect in the high speed drilling process to prevent too much pressure. Very suitable for use on portable electric drills bench drills drill presses etc. Product Name: Saws Gold color Hole Size: 16 mm / 0.62 inch 18.5 mm / 0.72 inch 20 mm / 0.78 inch 25 mm / 0.98 inch 30 mm / 1.18 inch Material: High speed steel Attention: the cut object must be well fixed and the trepan must put perpendicular to its plan. tip: add coolant to the edge of the hole to avoid overheating and wear glasses that can protect your eyes. Package Content:1 x 16mm / 0.62inch hole saw 1 x 18.5mm / 0.72inchescious- 1 x 20mm / 0.78inch hole saw 1 x 25mm / 0.98inch hole saw 1 x 30mm / 1.18inch hole saw 1 x 5 black key Only the package above the other products are not included.