Because the sharp and thin tip,please don't overexert when punch,please use a soft things like leather to protect it it maybe damage if you use on the hard object such as cutting mat,especially in winter. To extend the life of French style chisel,we don't recommend to punch more than 3mm thick leather directly. when you punch more than 3mm thick leather ,please punch separately with obverse and reverse direction and please straight pull out ,don't pry to both sides.thanks. this Steel is great anti-rust property.but it don't mean it will no rust at all. we suggest to apply anti-rust oil when you don't use it for a long time. Colour:silver Material:steel Package Contents: 1 x -3.85mm 2 teeth Punching Tool 1 x -3.85mm 8 teeth Punching Tool Only the above package content, other products are not included. Note: Light reflection 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.