Features:

• Professional wood drill bit, suitable for construction, installation, renovation, decoration industry, etc.
• Special steel, heat treatment, HRC48~50, high hardness, lengthened core, high concentricity.
• It will get double effect by matched use with mortise and tenon machine, the square hole punching needs to use electric drill, hammer & other tools.

Specifications:

• Material: HSS
• Hardness: HRC 48~50
• Holder diameter: 19mm (circular)
• Drilling core length: 200mm
•       Slotting flute diameter   Total weight

   5/16"(8mm)              approx 161g 

   3/8"(9.5mm)             approx 177g 

   1/2"(12.7mm)           approx 206g 

Package Included:

• 1x Tenon Hole Drill