4Pcs Woodworking Square Hole Drill Bits Wood Mortising Chisel Set Mortise Chisel Bit Kits Woodworking Hole Saw Sets with Twist Drill DIY Mortising Chisel Power Tools

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High quality - these square hole drill bits made of high speed steel, through heat processing, with high hardness drill bits, and sharp-edged square chisel, long life use.

Size: 1/4 Inch (6.4mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm), 7/16 Inch (11mm), 1/2 Inch (12.7mm),chooseing different specifications of the square hole drill, matching the appropriate power of the square hole machine, you can play a square hole to meet the requirements

Save time - these woodworking morstising chisel bits can reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industrie

Easy to Use - It will get double effect by matched use with mortise and tenon machine.The square hole punching needs to use electric drill, hammer or other tools

Widely Used - Great for drilling square holes in wood with a mortising machine or a mortising attachment.

Product Description

Features:
Suitable for construction, installation, renovation, decoration industry, etc.
Ground and Hardened high speed steel for efficient performance and long life
Apply for woodworking project,construction,installation,decoration industry

Specification:
Material: High Speed Steel(HSS)
Hardness: Up to HRC48~50

Shape of hole: square, rectangle
Suitable for bench drilling machine, mortising machine or a mortising attachment

Package Included:
1 x 1/4-Inch (6.4mm)
1 x 5/16-Inch(8mm)
1 x 3/8-Inch(9.5mm)
1 x 7/16-Inch(11mm)
1 x 1/2-Inch(12.7mm)