3mm 4mm Countersink Router Bit Woodworking Wood Milling Cutter Drill Bits Alloy

Feature: *Specially designed steel counterbore or counterbore guide hole. *The depth of the counter bushing can be adjusted using a hex wrench. *Drills and countersunk heads are used for wood screws no need to replace the drill bit. *Just loosen and tighten the fixing screws you can adjust the drilling length of screws of various lengths. *Uses: used for wood aluminum alloy screw countersinks holes. Specification: Product Name: Countersink Router Bit Material: Alloy 45# carbon steel surface sprayed Color: Red Silver(As shown) Shank Size: 10mm Length: 57.5mm Optional Head: 3mm 4mm 2pcs Set Suitable for: wood aluminum alloy screw countersinks holes. Quantity: 1pc / 2pcs Package Included: 1 x Router Bit Or 2 × Router Bit Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.