Product Features:
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<br />100% Brand New and High Quanlity 
<br />This Mortising Chisel set is great for drilling square holes in wood
<br />Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries.
<br />Use matters: Square hole drill is mainly used for woodworking aspects.
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<br />Specifications:
<br />Material: high-speed steel, 
<br />Hardness: 56HRC
<br />Fits mortising attachments with 3/4 &quot;collars
<br />Type Size:
<br />Set of 4 - 1/4-Inch (6mm), 5/16-Inch (7mm), 3/8-Inch (9mm) and 1/2-Inch (12mm)
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<br />Package Included:
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<br />4pcs/set  Woodworking Mortising Chisel