Woodworking Hole Opener Set $ 5.23 specification: Chamfering device Corresponding drill size 6# 2.38mm 8# 2.78mm 10# 3.175mm 12# 3.56mm The diameter of the hexagon handle is 6.35mm Function: You can drill the screw hole and the counterbore for the screw cap at the same time and keep the two on the same axis. After the screw is screwed on, the screw cap is located below the plane of the board! Suitable for: drilling machines with chucks or joints, suitable for drilling on hard wood and wood layers
