Package Including: 4×Countersink Drill Bits Highlight description: [High Speed Steel Material] The countersink drill bits set is made of high speed steel 4241. The stepped drill bit is rust-proof, the drill bit edge is smooth without burrs and grooves. It is used for compatible with sharp and precise countersinking, chamfering or tapering of workpiece round holes. [Remove Internal Chip Tool] The chamfered bit can remove chips from the cut to reduce clogging. It makes cutting faster, cleaner and quieter. The round shank can be used for various systems. [What You Get] The package includes 4 cone drill bits for 2-5mm, 5-10mm, 10-15mm, 15-20mm. It can be used for deburring, metal working and non-metal cutting. [Pointed 90° Tapered Hole] The pointed 90° tapered hole is used for compatible with sharp and accurate round hole chamfering or tapered hole. It can remove internal debris and prevents them from flying. The drill bit is used for bench drill. The hand drill is easy to shake, which will affect the chamfering effect. [Widely Uses] This countersink drill bits set is suitable for cutting plywood, wood, acrylic, PVC board, plastic and metal. It is necessary to keep the drill cool between holes when using material. Detailed description: Product Name: Countersink Drill Bits Set Material: High Speed Steel 4241 Notes: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement. [Remove Internal Chip Tool] The chamfered bit can remove chips from the cut to reduce clogging. It makes cutting faster, cleaner and quieter. The round shank can be used for various systems. [What You Get] The package includes 4 cone drill bits for 2-5mm, 5-10mm, 10-15mm, 15-20mm. It can be used for deburring, metal working and non-metal cutting. [Pointed 90° Tapered Hole] The pointed 90° tapered hole is used for compatible with sharp and accurate round hole chamfering or tapered hole. It can remove internal debris and prevents them from flying. The drill bit is used for bench drill. The hand drill is easy to shake, which will affect the chamfering effect. [Widely Uses] This countersink drill bits set is suitable for cutting plywood, wood, acrylic, PVC board, plastic and metal. It is necessary to keep the drill cool between holes when using material.