ITEM NAME:55 PCS HSS 4241 Countersink Cone Drill Bit Set and High Speed Steel HSS Tit A9O1 55 PCS HSS 4241 Countersink Cone Drill Bit Set and High Speed Steel HSS Tit A9O1 Countersink Cone Drill Bit Size: 5#,6#,8#,10#,12#, Twist Drill Bits Size: 1 mm,1.5 mm,2 mm,2.5 mm,3 mm With 1/4 inch Hex Shank Contains L Wrench ,can adjustable counter sleeve depth Drill part material: high-speed steel 4241 ,for hardness 25HRC the following parts, such as carbon steel, thin iron plate, insulation board, PVC board, wood Suitable for drilling machines with chucks or fittings for drilling on hard wood and wood Product Name: 1/4 hexagonal handle cone hole drilling hole drilling woodworking countersunk head drilling screw reaming drill bit Shank: 1/4 hex handle (6.35 mm) Material: drill part of the high-speed steel 4241 (for hardness 25HRC the following parts, such as carbon steel, thin iron plate, insulation board, PVC board, wood, etc.). Black chamfering material for the carbon steel Contains 5 pcs countersink wood bit and 1 pcs wrench. High Speed Steel HSS Titanium Twist Drill Bits 1 mm,1.5 mm,2 mm,2.5 mm,3 mm each size have 10 pcs Material: HSS 4241 Surface treatment: titanium plating color: gold,black Package Contents: 5 x Countersink Cone Drill Bit 50 x High Speed Steel HSS Titanium Twist Drill Bits 1 x wrench Only the above package content, other products are not included. Note: Light shooting 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.