10pcs carbide mini drill 03, 04, 05, 06, 07, 08, 09, 10, 11, 12mmStem diameter: approx. 1/8 inch (3175 mm)Long life, it can drill 2000-5000 pcs in normal working conditions, can also go back grinding 4-5 timesMaterials: alloy and high qualityDrilling has a area of leftover discharge, little and softness when dumping waste.Using high quality materials and proper grinding process makes sharp bit sharper, reduce cutting force and breakage drilling, improve the quality of the wall of the hole.The cutting edges avoid strictly partial hole, guarantee the quality.Package Contents:10 x drillOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.