Professional . the blade has great elasticity and durability. Hardened and tempered, hardened, hardness is good, the blade will not . Made of heat treated high carbon steel with the necessary hardness and durability. Suitable for most inflatable hand- hammers, scrapers or scrapers. Used for the removal of masonry and concrete, minor shreds and serrations, mortars, glass compounds and other masonry products. it is sturdy and has a long service life. 9 different shapes of hammer tangents meet different job requirements. A superior quality air hammer wheel that can be used with pneumatic tools. Used for masonry and concrete removal, hard surface cracking and abrasion. colour:Photo Color Material:40CR steel Package Contents: 1* set Pneumatic hammer(9 pcs) 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.