The handle is made of premium lacquered aluminum alloy, rotary mounting head is made of sturdy M2 high speed steel, knives included are made of quality high speed steel The deburring tool kit came with 21 knives, perfect for cutting the round holes edge, deep holes, straight edge, curved edges, slots. It fits DIY projects for home use to professional industrial applications Efficient and comfortable. With 360 degree swivel mounting head, comfortable handle and replaceable design. The blade is mounted on the handle that rotated 360 degrees, works great for both right/left-handed friend. You can replace the knife by simply pressing the button. The Grip is 12.7 cm long and is comfortable and safe to hold. 11pcs BS1010 Black HSS High Speed Steel Blades, Suitable for wood, plastic and soft metal (such as copper, aluminum and silver) 5pcs BK3010 Black HSS High Speed Steel Blades, Suitable for (diameter <1.5mm) hole and clip clean. 5pcs BS1018 Silver HSS High Speed Steel Blades (Contains cobalt for strong cutting), Suitable for stainless steel. Must have tools if you want to clean up 3D printing. Deburring copper tube, holes drilled in aluminum, silver line product, tin, trunking, etc. Deburring Set: This hand deburring tool kit can be used for cross holes, deep holes, straight edges and curved edges. Suitable for home use, 3D printer, sanitary applications or as a professional workshop. For example, you can use it for removing burrs from cutting pipes, pipes, pipes, and PVC pipes making it a great pipe deburr tool. Tip: It is easy to install by compressing the mounting head. The installed blade can flexibly rotate 360 degrees. It is sharp and easy to remove. Be careful and take it away from the children. Packaging: 1 x hand deburring tool 15 x knives.