The blade is made of high-purity tungsten steel, with advanced manufacturing technology, excellent cutting performance, and wear resistance. The blade is , handle with care. The blade holder uses high-quality bearings to smooth and stable cutting. The outer shell of the holder is made of hard alloy, which is beautiful and wear-resistant. Offers 11 levels of adjustable cutting depth. Instructions for use: Before use, you need to remove the protective shell of the blade, Then put the blade into the blade holder. If you need to remove the blade, press the handle above the blade holder and the blade will out. Material: Metal colour: green Package Contents: 5 x 30 degree blades 5 x 45 degree blades 5 x 60 degree blades 1 x blade holder Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.