Product Description From the Manufacturer Stanley 16-298 3 Piece Cold Chisel Kit   Product Description PO16-298 Features: -Cutting edge is hardened to 52-58 HRC and is ground to a precise angle for efficient cutting and durability.-Striking edge hardened to 42 HRC and has chamfered edges to help resist chipping.-Size marking on shank allows for easy identification of the tool.-3 piece set contains one 16-286 - 3/8'' x 5-9/16'', one 16-287 - 1/2'' x 6'' and one 16-288 - 5/8'' x 6-3/4''.-Carded. Construction: -One-piece construction forged from chrome vanadium steel for strength and durability. Color/Finish: -Powder coated finish for durability.-Yellow high-visibility finish.