Combination Tap Drill Bit Set 1-4-Inch Hex Shank HSS Deburr Countersink Bits Kit 6-32NC 8-32NC 10-32NC 10-24NC 12-24NC 1-4-20NC

Size: 6-32NC,8-32NC,10-32NC,10-24NC,12-24NC,1/4-20NC 1/4-Inch Hex Shank Tap Countersink Bits - Use for hole punching,tapping,chamfering - Hole drilling, tapping and deburring/countersinking - SAE Drill/Tap/Deburr Bit Set For Aluminum,&Plastic - Deburr/countersink also provided on bit beyond back taper - Back tapered beyond tap to prevent thread damage from over-drilling. Notice!! It?s highly recommended that the combination drill and tap bits are used on a tapping machine. If you apply an electric hand drilling machine to do the tapping job, please pay attention to your operating, because excessive shaking and tilting may affect the result and even break the bit. Specification: Material: HSS 4341 Shank: 1/4 inch(6.35mm) hex shank Size: 6-32NC(3.5mm), 8-32NC(4.2mm), 10-32NC(5mm), 10-24NC(5mm), 12-24NC(5.7mm), 1/4-20NC(6.35mm) Package Included: 6pcs Drill Tap Countersink Set