Specification Material: metal, wood Length:12cm/13cm Droppshing:support Sew everything from leather and denim to canvas or tarpaulin! The kit can punch holes in a wide variety of materials, including strong, tough, and thick materials that other needles cannot pierce. The Sewing Tool kit can be used on heavy duty tarps, such as farm and boat tarps, as well as clothes and bags. You can even use it to do your own strap repairs at home!