Chicago-latrobe 57728 Drill Bit Set 115 Pc Hss

Product Description

The CHICAGO-LATROBE 57728 is a 115-piece jobber length drill bit set in High Speed Steel (HSS) with an oxide finish, covering sizes from 0.04 inches (No. 60 wire) through 0.5 inches (1/2 inch fractional). The set spans wire gauge sizes No. 60 through No. 1, letter sizes A through Z, and fractional sizes from 1/16 to 1/2 inch in 1/64-inch step increments. Each bit features a standard 118-degree split point, straight shank, and right-hand cutting direction. Packaged in a metal or plastic case, this Series 150 set is designed for general-purpose metalworking and multipurpose drilling applications performed by machinists, maintenance technicians, and trade professionals.

This set is suited for residential and commercial maintenance, fabrication shops, and jobsite use where a broad range of hole sizes is required in a single kit. The inch-system sizing covers the most commonly used wire, letter, and fractional drill sizes in one organized case. Typical applications include metalworking, general mechanical repair, and multipurpose drilling through mild steel, aluminum, and similar materials. The oxide coating provides basic lubricity and corrosion resistance for shop and field environments.

Key Features

• 115-piece set covering wire gauge No. 60 to No. 1, letter A to Z, and fractional 1/16 to 1/2 inch
• High Speed Steel construction for general-purpose metal drilling
• Oxide finish for improved lubricity and basic corrosion resistance
• Standard 118-degree point angle with right-hand cutting direction
• Straight shank for compatibility with standard drill chucks
• Organized metal or plastic storage case included

Compatibility

Designed for use in standard keyed or keyless drill chucks accepting straight-shank jobber-length bits in inch sizes up to 1/2 inch. Suitable for benchtop drill presses, handheld power drills, and magnetic drill motors configured for inch-system tooling.

Installation Notes

Installation and use of drill bits in this set should be performed by qualified machinists or trade professionals familiar with proper chuck seating and drilling speeds for HSS tooling. Ensure the drill or press is powered down and locked out before changing bits. Select the appropriate bit for the material and hole size required, and verify the shank is fully seated and tightened in the chuck before beginning operation. Do not exceed the recommended cutting speed for the material being drilled, as overheating will reduce tool life.