Blade material: SK5 steel.<br />Different size tool bits are good for rubber seal engraving ，wood carving，leaf carving，paper carving，etc.<br /><br />Package Included:<br />23 x SK5 BLA<br />3 x Rubber Coated Handles<br />2 x Scratch awl blades<br />1 x Grindstone<br />1 x Tweezer<br /><br />