Zzanggu 4Pcs Square Hole Drill Bit Set(1/4, 5/16, 3/8, 1/2 Inch) Mortising Chisel Hole Saw Drill Bit Set, Hole Saw Sets with Twist Drill for Woodworking DIY Power Tools

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Manufacturer Description

Zzanggu Square Hole Drill Bit Set (1/4, 5/16, 3/8, 1/2 Inch) Mortising Chisel Hole Saw Drill Bit Set

?Specifications?

[Material] High Speed Steel

[Hardness] HRC48-50

[Size] 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm)

[Weight] 160g,200g,205g,210g

[Clamping Shank Diameter] 19mm (Round)

?Features?

[1] Perfect for woodworking project

[2] To machining square hole, must drill the hole or cutting machine processed crude hole, then chisel detail part by hand

[3] Crushing round bits and square outer wall, processing a square hole one-time, and the dust can be broken slag discharged from the tube

[4] This Mortising Chisel is great for drilling square holes in wood with a mortising machine or a mortising attachment

[5] Professional wood drill bit, suitable for construction, installation, renovation, decoration industry, etc.

?Tips?

? 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 some cutting fluid to keep the bits cold during usage

?Package Contains?

1Pcs x 1/4" Square Hole Drill Bit

1Pcs x 5/16" Square Hole Drill Bit 

1Pcs x 3/8" Square Hole Drill Bit 

1Pcs x 1/2" Square Hole Drill Bit

Product Features

?4Pcs Square Hole Drill Bit Set? Size: 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm). ?Industrial Grade Material? Made of high quality High Speed Steel, hardness of HRC48-50. 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 ?Woodworking Project? Crushing round bits and square outer wall, processing a square hole one-time, and the dust can be broken slag discharged from the tube ?More Efficient Work? This Square Hole Drill Bit Set greatly reduce the labor intensity of workers, reduce construction costs and improve efficiency of the project ?Wide Range of Uses? This Mortising Chisel is great for drilling square holes in wood with a mortising machine or a mortising attachment. Professional wood drill bit, suitable for construction, installation, renovation, decoration industry, etc.

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