Hardness: 57Surface: fine blanking blackened stainless steel (easy paint、 no rust)Dimensions: stretching clamp time - 16.7 cm、 shrink clamp (handle length) -10.5 cmWeight: 0.35KG (including nylon sleeve and screwdriver)Accessories: 11 different sizes of screwdriver heads、 no deformation of high quality black GB GB special protective case and original paper boxColor: Black