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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

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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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

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