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Kisslife Professional HSS Drill Bits Set Twist Drill Bit Set1/8 1/16 3/64 5/64 3/32 7/64 Jobbers Length Twist Drill Bit Set Industy HSS TIN Coated Mini Micro Drill Perfecct for Steel Wood Plastic Aluminum Alloy 60 PCS Package Included: 3/64inch x 10PCS Drill Bit 3/32inch x 10PCS Drill Bit 1/16inch x 10PCS Drill Bit 5/64inch x 10PCS Drill Bit 7/64inch x 10PCS Drill Bit 1/8inch x 10PCS Drill Bit Total Quantity: 60pcs Product Feature: Material: Industry High Speed Steel (HSS4241) Surface Treatment: Titanium Coated Tip Angle: 118 degree Process: Full Ground Weight: 3.5OZ Application: alloy steel, wood, plastic, PVC and other handicraft industry drilling Working principle: the round hole of the workpiece is drilled through the rotary cutting of its relative fixed axis. Note: 1. This drill bit set can not be used in the impact drill 2.In order to avoid drill bit break, 1mm and 1.5mm bits should be used with pin vise 3. 2mm、2.5mm、3mm bits can be used with power drill, with low speed and low drilling pressure