Craftmaster Diamond Point 12-Piece Stitching Chisel Set- MasterCraftmaster Diamond Point 12 Piece Master Stitching Chisel Set. This set includes all 3 of our diamond point stitching chisel sets 3mm, 4mm, and 5mm (378 96058, 378 96063, 378 96068). Premium stitching chisels, each crafted from a solid piece of high strength steel, and polished to a fine, brushed shine and ultra smooth feel. Each tool is engraved with the size, for quick reference. Though incredibly strong, these high caliber tools are lightweight