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❤What You Get The Drill Stop Bit Collar Set includes 1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" plus an Allen Wrench for Tighten The Stops Set-Screws. This Locator Limit Ring can be used for drills of the above size. Please confirm the size before purchasing.

❤Material Each bit collar is constructed out of heavy duty solid carbon steel for long term durability and corrosion resistance, The surface has been blackened to improve the anti-rust performance. The Durable Alloy Steel Setscrew Type Collar will stay sturdy when tightened and is specially designed not to damage the bits.

❤Feature This drill stop ring can help you drill to the exact depth quickly and easily, and repeat drilling by reliably locking any position on the drill. It is applicable to mechanical shaft instruments or woodworking tools as the limit ring of drill bit.

❤Application Bit Limit Rings are used as a Shaft Collar on machinery and can be used on twist drill bits or brad point drills or any type of bit to prevent excessive drill bit penetration and for any job that uses a bit and needs precision. These drill bit depth stop collars ideal for professionals and DIY enthusiast doing production work or repeated drilling projects.