General 87 Automatic Center Punch 5/16 in Aluminum

Product Description

The GENERAL 87 is an automatic center punch used to mark drill start points on metal, wood, and other materials without the need for a hammer. The spring-loaded mechanism delivers a consistent strike each time the tool is pressed into a workpiece. With a 5/16 inch punch diameter and an overall length of 5.5 inches, this tool is well suited for layout and fabrication work in the shop or field. The knurled grip provides control during use, and the aluminum construction keeps the tool lightweight at 0.09 pounds. Machinists, fabricators, plumbers, and electricians commonly use center punches during layout work to prevent drill bit walking on smooth surfaces.

This punch is designed for professionals who mark hole locations as part of installation and fabrication tasks. It is a standard hand tool for any trade shop, service van tool kit, or job-site layout kit. The automatic action eliminates the need to carry a separate hammer or mallet, making it efficient for single-handed marking in confined or overhead locations. Typical applications include marking conduit, pipe, sheet metal, and structural components before drilling.

Key Features

• Automatic spring-loaded mechanism delivers consistent strike force without a hammer
• 5/16 inch punch diameter for standard center-mark sizing
• Overall length of 5.5 inches for comfortable handling and reach
• Knurled grip style for secure control during use
• Aluminum construction keeps tool weight at 0.09 pounds
• Compact size fits tool pouches and service van kits

Compatibility

Designed as a general-purpose automatic center punch suitable for layout and marking tasks on metal, wood, and similar materials across plumbing, electrical, HVAC, and general fabrication trades.

Installation Notes

No power tools or fasteners are required for use. Position the punch tip on the intended mark location and apply downward pressure until the spring mechanism fires. Inspect the punch tip regularly for wear or deformation, as a damaged tip will produce off-center or inconsistent marks. Keep the tool clean and lightly lubricated at the adjustment collar to maintain consistent spring tension.