Feature

●1. Package includes 5 different sizes mortise chisel drill bit 1/4 Inch (6.4mm), 5/16 Inch (8mm), 7/16 Inch (11mm), 1/2 Inch (12.7mm), 5/8"(16mm). They can meet your different ordinary need. Each drill is packed in a single plastic case, easy to maintain.
●2. The square hole mortise chisels are made of high-speed steel / HSS, heat treatment, high hardness, lengthened core, high concentricity.
●3. These woodworking morstising chisel bits is with high performance flute design geometry for superior chip extraction.
●4. Woodworking drill bit sets with long drill core and square chisel, easy to lock the hole on the wood, can reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs.
●5. These woodworking morstising chisel bits set fit all mortising machines and drill press attachments, mainly used for woodworking aspects in construction, installation, renovation, decoration industry, etc.


Description

5 pcs Square Hole Mortise Chisel Drill Bit Tools, HSS Woodworking Hole Saw Mortising Chisel Drill Bit Set, Different Sizes 1/4" 5/16" 7/16" 1/2" 5/8"


Specification:
Material: High Speed Steel(HSS)
Hardness: Up to HRC48~50
Size: 1/4"(6.4mm), 5/16"(8mm), 7/16"(11mm), 1/2"(12.7mm), 5/8"(16mm)
Shape of hole: square, rectangle

Shaft length ( Drilling depth ):
-1/4"(6.4mm): 47mm
-5/16"(8mm): 52.6mm
-7/16"(11mm): 60mm
-1/2"(12.7mm): 75mm
-5/8"(16mm) :75mm

Clamping shank diameter: 19mm (Round)

Package included:
5Pcs woodworking chisel drill bits

Note:
* Square hole drill can not be used on an electric drill, drill square holes need to fit a square hole drill drilling (mortise and tenon machine) to use.
* To avoid drill bits become overheated and get burned up due to fast rotary friction, we suggest use cutting fluid to keep the bits cold during usage.