QISF 7Pcs 300mm Extra Long Twist Drill Bits Set (4-12mm)+ 9Pcs Woodworking Drill Bit Depth Stop Collars Ring Locator (3-16mm),for Wood Hole Cutter Drilling DIY Plastic

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  • Perfect Tools Set --- Extra Long Twist Drill + Stop Collar accurately control the depth of a hole you are drilling.Great for drilling depth when a precise measurement is needed for hole depth; Designed to hold your drill bit securely in place and grip the entire diameter of your drill bit without the screw ever touching the shaft.
  • Wide Applocation --- Great for most drilling jobs and soft materials such as aluminum, wood, plastics et.
  • Easy to Use --- Simply choose the appropriate size drill bit and stop collar, slide the collar on the bit and set the required depth with a ruler or depth gauge (not included), then tighten the collar screw to the drill bit.
  • Package --- 7 Pcs 300mm Extra Long Twist Drill Bits(4-12mm) + 8 x Drill Bit Depth Stop Collar(3-16mm) + 1 x Hex Wrench ; *** Because the drill bit is too long (Easy to break or deform), please pay attention to the speed and safety when using ***

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