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Product Description PERFORMANCE : 4/6 variable pitch teeth cut faster DESIGN : Extra hard high speed steel teeth DURABILITY : Flexible, shatter resistant steel body VERSATILITY : For use drilling holes in steel and wood INCLUDES : 6" Bi-Metal hole saw About Model Makita Hole Saws feature bi-metal construction for longer life. The flexible steel body and the high speed steel teeth combine for more efficient cutting. These versatile saws cut through both metal and wood and have the deep cutting ability to go through 2x4 material. Features 4/6 variable pitch teeth cut faster Extra hard high speed steel teeth Flexible, shatter resistant steel body For use drilling holes in steel and wood Deep cutting capacity through 2x4 material Durable bi-metal construction Use with Makita Arbor 714065-A which has 5/8" - 18 thread Specs Product Type (DB, HS) : Bi-Metal Hole Saws Diameter : 6" Application (DB, RHB, HS) : Steel, Wood Use Arbor # : 714065-A Package Quantity : 1 Shipping Weight : 3.77 lbs. UPC Code : 088381-903196 From the Manufacturer Bi metal for wood and metal
4/6 variable pitch teeth cut faster, last longer
Extra hard high speed steel teeth
Flexible shatter, resistant steel body for long life
Drills through steel and wood
This hole saw is worth every penny and then some.I drilled 6 holes from 3/4" thick bars of 6061 aluminum with this hole saw (3/4" thick metal!) and the teeth are still perfectly sharp.The first time this drilling caused so much torque because of inadequate lubrication that it snapped my arbor, and had to buy a better arbor. The hole saw was stuck in the overheated aluminum workpiece, which I had to quench in water to remove the holesaw. The hole saw was fine. I used plenty of lubrication at 250rpm for the next 5 parts. I then put a bunch of holes in plywood. For another project.After all of this, all the paint (powder coat) is gone from the business end half of the hole saw, leaving shiny steel, and all of the teeth are _very_ sharp, ready for more abuse. I am impressed.Note:A 2 5/8" hole saw cuts a hole that will fit a beer or soda perfectly (except Coors, which is about 4.5 percent slimmer). Makes for and excellent can insulator if you stack enough wood.