1pcs metal alloy silver finish classic safety (3.5" size):This silver safety razor works by opening the mechanism by turning/twisting the knob and the entire part will come apart/open, insert a new blade and then firmly close it to secure the blade.1pcs metal alloy black finish handle classic safety (4.25" size):The black safety razor works by the opening mechanism by twisting the bottom of the handle to open the razor head, carefully inserting a new blade, and then twisting the bottom until the head closes completely securely.20 pcs double-edge razor blades.You can use any other brand of double edge blades.Ideal for hair salons, barbershops, and household use.Hard to find product.What's included (safety razors set in silver & black)?-1 pcs metal alloy chrome finish classic safety.-1 pcs metal alloy black finish classic safety.-4 packs (20pcs) super-max brand double-edge razor blades.-Each comes in beautifully crafted packing.