Feature●DCMT21.51(070204) Carbide inserts: 55 degrees single side with cheaper , 3/32" Thick,1/64" Radius●The 3pcs holders: made of 40CrMo with forging process, includes 3pcs T8 wrenches ,shank dia =0.31",length=3.9"●Designed for Steel, cast iron and non-ferrous materials●Used for turning and finishing on a wide range of materials●Package includes: 3pcs holders + 30pcs inserts, Contained in plastic boxes, easy to store, waterproof, rust-proof, and anti-oxidation.Description Package includes: 3pcs holders + 30pcs inserts,