Drillco® Nitro Heavy-Duty Mechanic's Length Drill Bit Set, 29 Pieces, High Speed SteelManufactured from a premium grade of M 7N molybdenum high speed steel The Nitro Heavy Duty 135 Split Point Drill with a Nitride surface treatment that gives a hard protective layer to the drill (increases hardness without increasing brittleness) which is measurably harder than high speed steel Body and clearance are gold and black surface treated for maximum lubricity Recommended for use in stainless steel and other hard metal drilling Specifications

Alloy steel spindles

brass and aluminum tubing and thin-wall conduit

Removable accessory box offers additional customization options

Drain holes to prevent water build-up

Features recyclable

TR (Type III)

joint & other crevice locations susceptible to corrosion

High viscosity

Zero setting at any position

Optimum bond matrix provides a faster

Fits perfectly with the MARTOR CONNECTOR

Square Male Size