Сверлильный бор HSS для квадратных отверстий, 7.94мм

CE Mainland China Type: Gun Drill Bit DIY Supplies: Woodworking Material: high speed steel Specifications: 6mm, 6.35mm (1/4), 7.94mm (5/16), 9.5mm (3/8), 10mm (7/16), 12.7mm (1/2) Quantity: 1 piece Drill bushing diameter: about 19mm Drill sleeve size: about 138.00x19.00x19.00mm (5.43x0.75x0.75inch) Note: Due to different monitor and light effect, actual color may differ. Please allow 1-2cm measuring deviation. 6-12.7mm HSS Square Hole Drill Bit Square Auger Mortising Chisel Drill Set Square Woodworking Drill Bits Woodworking Drill Tools Feature: 1. For Woodworking Joinery: ideal for drilling square holes in wood using a mortising machine or mortising attachment. 2. Requires Square Hole Drill Machine: mortiser required; cannot be used with a regular electric drill. 3. Combines Auger Drill Bit and Outer Sleeve Drill Bit to create precise square holes. 4. Reduces labor and speeds construction, lowering overall costs. 5. Excellent material and craftsmanship for clean square holes without burrs. 1 x HSS Square Hole Drill Bit