This Diamatip is 1/4" x 4" in length and is specially designedtip is coated with diamond chips and works with a blue lubricant inserted in the core of the drill bit. As the Diamatip starts cutting, it creates heat that melts the special lubricant, flushing all surfaces of unwanted debris. With the Diamatip, it's possible to achieve a 20-25 minute penetration through the carbide matrix used in many GSA containers - with-out having to use a "punch and drill" technique. With care, you should be able to penetrate 1 1/2" - 2" plates per cutter. A small tube of lubricant is included with each bit.
Diamatip Drill Bit Instructions