This is the new titanium core drill bit hole cutter set, made of high quality HSS steel and coated with titanium to reduce friction and heat. It is very suitable for use in cutting holes in a variety of materials, including steel, brass, wood, plastic, etc. size: 10 * 1 * 1cm Material: Steel color: Gold Package Contents: 2 * Cloth Bag 2 * 4-12mm Countersink Drill 2 * 4-20mm Countersink Drill 2 * 4-32mm Countersink Drill Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.