▲ ▲ 3/4 mortising chisel diameters: 3/4 Inch(19mm), The holding diameter is 19mm / 3/4inch (as picture show), high-speed steel material, high hardness, sharp-edged and durable drill bit . ▲ ▲ Only used for the opening square hole or rectangle hole, used on most of mortising machine or mortising attachment & tenon machine. CAN NOT be used on an electric drill. ▲ ▲ Once molding sqare hole, speed up construction, Reduce labor intensity ,reduce the construction cost of construction, installation, decoration, decoration and other industries ▲ ▲ Work for hollow chisel mortising machine or drill presses had adjustable chucks , these square hole drill bit attach to a Drill Bit Adapter that bolts to your drill press .( which can hold 3/4" shaft of the chisels, drill bit adapter is not included) . ▲ ▲ The Mortising Chisel consists of two parts，round Core drilling and square drilling ( as picture show ).when installing ,this two parts need to be held tightly by a clamp. Mortising chisel square hole drill bits
1. Great for construction, installation, renovation, decoration industry, etc.
2. Apply for woodworking project, such as solid wood ,board, Plywood and so on
3. Woodworking Square Drill Bits can be used on mortising machine or mortising attachment & tenon machine. CAN NOT be used on an electric drill.
4. Material: High Speed Steel(HSS)
5. Hardness: Up to HRC48~50
6. Support Diameter(holding dia): Approx. 19mm / 0.7inch

How to work ?
This Mortising chisel bit is Combination of square and round drills, the impact of the use of hammer impact force transmitted to the outer body,
the material crushing round hole and square head wall, a one-time processing of a square hole.

Package include:
1 pc x 3/4 " woodworking Mortising Square Hole Drill Bit