Square Drill Bits Tool Kit Set 4PCS

• ✅ MATERIAL:Wood Square Hole Mortising Chisel Drill Bit is made of special steel, through Heat Treatement to keep the hardness to be HRC 48-51, Lengthened Core and high concentricity during application.
• ✅ TIP AND EDGE:The best designed Drilling Point tip and 4 Cutting Corner to enable the fast drilling and penetrating into working pieces of wood very smooth and fast.
• ✅ OPERATION:It always is used with mortise and tenon machine with double effect, and electric drill, hammer and other tools is required for punching square hole in wood
• ✅ ADVANTAGES:The tool can be great helpful to reduce labor intensity of construction workers, speed up effiency and redcuce cost in construciton, installation, renovation, decoration industies.
• ✅ APPLICATION:For best professional mortising chisel drill bits suitable for mortising machines and drill press and square hole drill is mainly used for woodworking aspects.

• Features:

Product size: 1/4inch(6.4mm), 5/16inch(8mm), 3/8inch(9.5mm), 1/2inch(12.7mm)
Weight:
1/4inch(6.4mm)--122g
5/16inch(8mm)--138g
3/8inch(9.5mm)--153g
1/2inch(12.7mm)--217g

• Package included:

4 x Square Hole Drill