6.4/8/9.5/12.7mm HSS Carpenter Square Drill Bit Hole Drill Guide Positioner Tool Craving Woodworking Tools 4pcs

6.4/8/9.5/12.7mm HSS Carpenter Square Drill Bit Hole Drill Guide Positioner Tool Craving Woodworking Tools 4pcs

These square hole woodworking drill bits are made of high speed steel through heat processing, include high hardness drill bits and sharp-edged square chisel, sturdy and durable.

Labor-Saving: These woodworking mortising chisel bits can reduce labor intensity of construction workers, speed up the construction process, lower construction costs for construction, installation, renovation, decoration.

Easy & Precise Hole Drilling: Using different sizes of the square hole drill to match the appropriate power of the square hole machine, 4 different sizes you can choose to meet your need-1/2" (12.7mm), 3/8" (9.5mm), 5/16" (8mm), 1/4" (6.4mm).

Work Scenarios: It will get double effect along with mortise and tenon machine. The square hole punching needs to use electric drill, hammer or other tools.

Application: Great for drilling square holes in wood with a mortising machine or a mortising attachment.