High Efficiency Countersunk Drill Bit Set - High Hardness HSS Steel for Metal, Wood & Concrete - Perfect for DIY Projects, Home Renovation & Professional Construction Work

Product Description

Feature:1. The set includes drill bits for drilling pilot holes, screw sizes are 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm.2. Specially designed steel countersunk or countersink guide holes.3. Drilling and countersinking wood screws without changing drill bits.4. Just loosen and tighten the set screws to adjust the drilling length of screws of various lengths.5. 5 flute design for quicker wood chip removal during use.Specification:Item Type: Countersunk Drill BitDimension:3mm x 60mm(L) Chamfer Diameter: 15.8mm4mm x 75mm(L) Chamfer Diameter: 15.8mm5mm x 85mm(L) Chamfer Diameter: 15.8mm6mm x 93mm(L) Chamfer Diameter: 15.8mm7mm x 100mm(L) Chamfer Diameter: 15.8mm8mm x 110mm(L) Chamfer Diameter: 18.8mm10mm x 120mm(L) Chamfer Diameter: 18.8mmShank: 1/4 hex shankSize Error: ±2mm Package List:7 x Countersunk Drill Bit1 x Hex Wrench