Key features

• •7 Sizes: shank type: round handle, 6/25 inches (6 mm), 1/4 inches (6.4 mm), 5/16 inches (8 mm), 3/8 inches (9.5 mm), 2/5 inches (10 mm), 1/2 inches (12.7 mm), 9/16 inches (14 mm), totally 7 different sizes
• •Application: Our woodworking morstising chisel bits set only suitable for mortising machine or mortising accessories, which can greatly improve the working efficiency of carpenter, also suitable for installation, decoration -- Square hole drill can not be used on an electric drill, bench drill, drill square holes need to fit a square hole drill drilling (mortise and tenon machine) to use
• •Fine Workmanship: made of high-speed steel, with high hardness up to HRC48 - 50, durable and practical. Finished with fine polishment, these square drill bits come with no burrs to provide you a smooth drilling experience
• •Easy to Use: Mortise and tenon square hole drilled by Safer CCTV + outer sleeve in the middle of the combination Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries
• •Great Customer Service: If you are not satisfied with our products, please contact our customer service, we will reply in 24hr.