ITEM NAME:7pcs 5 Flute Countersink Drills Bit HSS Drills Bit Reamer Set Chamfer 3-10mm BX Specification: Brand new Material: HSS Drill 4241 Black chamfer drill body material: steel #45 Color: as picture shows Single flute edge chamfer 90 degree Great drill accessory for any work Heat treated & tempered high-carbon steel with Titanium Nitrate coating for superior cutting power Use on steel, aluminum & other metals, plastic or wood Enlarge or countersink holes, deburr edges; 15-degree chamfer Dimension: 3mm(Dia) x 60mm(L) 4mm (Dia)x 75mm(L) 5mm(Dia) x 85mm(L) 6mm (Dia)x 93mm(L) 7mm(Dia) x 10mm(L) 8mm (Dia)x 11mm(L) 10mm(Dia) x 12mm(L) Package included: 7pcs x woodworking chamfer 1pc x L-wrench Note: Please allow 0.5-1cm errors due to manual measurement Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.Enlarge or countersink holes, deburr edges; 15-degree chamfer. Single flute edge chamfer 90 degree. 7pcs x woodworking chamfer. Black chamfer drill body material: steel #45. Material: HSS Drill 4241. 7mm(Dia) x 10mm(L).