L. H. Dottie Tip-Bits® Replaceable-Tip Step Drill Bits

Dottie Tip Bits Step Drill Bits header image

L.H. Dottie's line of Tip-Bits Replaceable-Tip Step Drill Bits can significantly extend the life of a core step drill. Normally the first part of a step drill to fail is the first ½ inch. But now there is no need to buy a new bit when just the tip is worn. These innovative, replaceable tips lock in place with a "plier-tite" tip fit to extend the life of the core step drill, saving installers both time and money. So instead of throwing away a good bit that just won’t start a hole any longer, the first few steps can be replaced with Tip-Bits, making the drill bit start like new again at a fraction of the cost of traditional step drills.

Tip-Bits are a past winner of the prestigious "Platinum Tool Accessory Award" from Electrical Construction and Maintenance Magazine.

Dottie Tip-Bits are available in three popular sizes.
7/8" RTTP6010
1 - 1/8" RTTP6020
1 - 3/8" RTTP6030

Contact your Graybar representative for more information.

Features at a Glance

  • No need to buy a new bit when just the tip is worn
  • Tip pops out for replacement
  • Replaceable tip is also a 1/2 in. bit
  • Economical replaceable tips lock in place with "plier-tite" tip fit
  • More cutting edges last longer and run cooler
  • Base bits last 3 to 4 times longer at a fraction of the cost of new bits
  • Step bit performance is identical to that of non-replaceable tip bits
  • All replaceable-tip bits feature a patent pending, cooler running, low torque tri-point construction
  • Available in three popular sizes – 7/8 in., 1-1/8 in. and 1-3/8 in. and also in a two-pack (RTTP6000)
  • Extreme performance at less overall cost
  • Constructed of M2 high-speed steel coated with titanium and cobalt
  • Tri-cut tip cuts smoother, faster and cooler

Tip-Bits Spec Sheet

All replaceable-tip bits feature a patent pending, cooler running, low torque tri-point construction.