"Small resistance to chip removal, smooth to Made of premium carbide with high hardness, wear resistant, not easy to bend and break. remove shavings and drill holes. A sharper cutting edge can reduce cutting force and improve hole quality. Can be applied to, SMT, mold, hardware processing, electronics industry, etc. Strictly symmetrical cutting edge can ensure efficient work and avoid deviation when drilling. Features: Made of premium carbide with high hardness, wear resistant, not easy to bend and break. Small resistance to chip removal, smooth to remove chips and drill holes. A stop sharper cut can reduce cutting force and improve hole quality. Strictly symmetrical cutting edge can ensure efficient work and avoid deviation when drilling. Can be applied to hardware processing, to the electronics industry, etc. Multiple sizes included in one set to meet different needs. Compact size and stored in a box for easy transport. Specification: Material: Carbide Cut: 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm Weight: 160g/5.6oz (Approx.) Package List: 1 * white plastic box 10*0.5 drill bit Drill bit 10*0.6 10*0.7 drill bit 10*0.8 drill bit Drill bit 10*0.9"