DescriptionThis item is a professional drill bit set with special storage case. There are 17pcs of bills, point chisel, plat chisels and U groove chisel in the case. metal material for better durability and sturdiness.Features- Color: As shown - Material: metal - Bit: 5.5/6mm x 110mm; 5.5/6/6.5/7/7/8/10mm x 160mm; 14 x 210mm; 10/12/16mm x 260mm - Point chisel: 14 x 210mm - Plat chisel: 14 x 250 x 20mm, 14 x 250 x 40mm - U groove chisel: 14 x 250mm - metal material, tough and abrasion resistant. - drill bits, accurate and fine, increase drilling speed. - Mainly for drilling wood, plastic, fiberglass, printed circuit board, and etc. - for home DIY, building and engineering use etc.