Irwin Cobalt Alloy High Speed Steel Fractional Straight Shank Jobber Length Drill Bits 11/32 in Dia x 3 in Specialty Applicators or a sturdy plastic model

or a sturdy plastic model with convenient built-in shut-off valve

Waterproof and insoluble in water

please see the line drawing

Heavy-duty structural foam construction hauls up to 300 lbs

safe working load 225lb per pair

Irwin Cobalt Alloy High Speed Steel Fractional Straight Shank Jobber Length Drill Bits 11/32 in Dia x 3 in Specialty Applicators or a sturdy plastic modelConstructed of M 35 5 percent cobalt alloy high speed steel for super abrasive resistance in tough metals Heavy duty spiral flute design produces faster chip ejection Shorter cutting lips reduce torque for drilling in high tensile strength materials. 135 degree split point reduces feed pressure for easier penetration without work hardening