Proto J86A1/4S2 Cold Chisel 5/16 Inch Tip Steel

Product Description

The PROTO J86A1/4S2 is a cold chisel designed for cutting, shaping, and chipping hardened metal, concrete, and masonry. Built with a steel handle and finished in a full black oxide coating, this chisel resists corrosion and reduces surface glare during use. The tip measures 5/16 inches, the overall length is approximately 5.1 inches, and the part weighs 0.08 pounds, making it a compact tool suited for tight spaces and precise strikes. Tradespeople in mechanical, plumbing, electrical, and HVAC work reach for cold chisels when removing rusted fasteners, cutting through pipe hangers, or chipping grout and mortar. Installation and maintenance professionals will find this a reliable addition to a standard tool kit.

This cold chisel is appropriate for residential and commercial service work where a compact, corrosion-resistant hand tool is needed. Typical applications include removing seized fasteners, splitting corroded fittings, cutting sheet metal, and chipping concrete or masonry during rough-in or retrofit work. The 5/16-inch tip is well-suited for detail work and confined access points common in mechanical room environments. The black oxide finish helps extend service life in wet or humid job-site conditions.

Key Features

• Full black oxide finish provides corrosion resistance in wet and humid conditions
• 5/16-inch tip size suited for precision chipping and cutting in confined spaces
• Steel construction throughout for durability under repeated hammer strikes
• Compact 5.1-inch overall length fits tight access areas in mechanical and plumbing work
• Covered by a manufacturer limited lifetime warranty

Compatibility

Designed as a general-purpose cold chisel for use with standard ball-peen or engineer hammers in mechanical, plumbing, HVAC, and construction trade applications.

Installation Notes

Cold chisels are struck with a ball-peen or engineer hammer rated for the material being worked. Always wear ANSI-rated safety glasses or a face shield when using a cold chisel, as metal and masonry fragments can be ejected at high velocity. Inspect the chisel head for mushrooming before each use and dress the struck end with a file or grinder if deformation is present. Do not use this tool with a framing or claw hammer, as those striking faces are not designed for metal-on-metal contact.