Specification:Drill Head: HSS4241 with titanium coatingWoodworking Chamfer: high-speed steel #45Shank: Round handleProduct description:1. Material: HSS Drill 42412. Black chamfer drill body material: No. 45 steel3. Single flute edge chamfer 90 degree4. Great drill accessory for any work5. Heat treated & tempered highcarbon steel with Titanium Nitrate coating for superior cutting power6 Use on steel aluminum other metals plastic or wood7 Enlarge or countersink holes deburr edges; 15-degree chamferDimension:3mm(Dia) x 52mm(L)4mm (Dia)x 67mm(L)5mm(Dia) x 85mm(L)6mm (Dia)x 90mm(L)7mm(Dia) x 103mm(L)8mm (Dia)x 115mm(L)10mm(Dia) x 120mm(L)Package included:3mm silver drill bit + wrench4mm silver drill bit + wrench5mm silver drill bit + wrench6mm silver drill bit + wrench7mm silver drill bit + wrench8mm silver drill bit + wrench10mm silver drill bit + wrench3/4/5/6mm silver drill bit + wrench3/4/5/6/7/8/10mm silver drill bit + wrench