Century Drill And Tool Cobalt Pro Grade Drill Bit 25/64″ Overall Length 5-1/8″ Size:25/64″ x 5-1/8″ The cartridges are certified by

The cartridges are certified by NIOSH with P100/OV/CL/SD/HC approvals

Fits Doors 1–3/16 Inch to 2 Inch Thick

double union solder inlet and outlet connection

Steel shot filled for maximum power

Century Drill And Tool Cobalt Pro Grade Drill Bit 25/64″ Overall Length 5-1/8″ Size:25/64″ x 5-1/8″ The cartridges are certified byMade from M35 steel with 5% cobalt, Centurys Cobalt drill bits are designed to cut through extremely hard metals, including stainless steel No center punch needed: Century 135 degree quick cut points are self centering and penetrate faster with less pressurewill not walk or wander at the starting surface Extremely heat resistant, must be used and operated in power units that have a RPM speed of 1,500 or more for maximum efficiency Made in the U. S. A.