[Widely Used] Perfect drill bits suitable for drilling holes in various materials: within 3mm/0.12inch (iron plate, copper plate, aluminum plate); within 5mm/0.2inch (wood, PVC sheet, insulation boards). Not suitable for hard and brittle materials such as stainless steel, glass, tiles, walls, etc. [Material] Steel Higher performance and . [Easy Drilling] Two flutes for more cutting . The High Step allows you to feel the stop and never drill bigger by mistake Color: Gold Material: Steel Package Contents: 2 x 4-12mm Drill Bit 2 x 4-20mm Drill Bit 2 x 4-32mm Drill Bit 2 x Blue Cloth Bag 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.