Bon Tool 11-988 M Style Convex Jointer 3/8 X 1/2 Inches

Product Description

The BON TOOL 11-988 is an M style convex jointer built for forming half-round rodded and sunken joints in masonry, brick, and concrete work. The dual-end design provides two joint sizes in a single tool - 3/8 inch on one end and 1/2 inch on the other - so masons can switch sizes without changing tools mid-job. Heavy gauge steel construction gives the tool the rigidity needed to produce smooth, consistent joint profiles under repeated use. At 9.49 inches in overall length, it sits comfortably in hand during extended finishing runs. This tool is used by masonry contractors, concrete finishers, and skilled trades workers performing joint finishing on both new construction and repair projects.

The 11-988 is suited for residential and commercial masonry applications including brick veneer, block walls, and cast concrete flatwork or formed concrete where tooled joints are required. The M style convex profile is a standard joint form in masonry construction, producing the classic half-round appearance specified on many architectural drawings. Both the 3/8 inch and 1/2 inch ends conform to common joint widths found in standard brick and block coursing.

Key Features

• Dual-end design provides 3/8 inch and 1/2 inch joint sizes in one tool
• M style convex profile forms half-round rodded or sunken joints
• Heavy gauge steel construction for strength and long-term durability
• 9.49 inches overall length for balanced handling during finishing work
• Produces smooth, consistent joint profiles for professional results
• Suitable for masonry, brick, and concrete finishing applications

Compatibility

Designed as an OEM-style hand tool for use in standard masonry and concrete joint finishing applications where 3/8 inch or 1/2 inch M style convex jointing is required.

Installation Notes

This tool is used by masonry contractors and concrete finishers during joint tooling operations. Tool joints at the correct stage of mortar or concrete set - working too early or too late affects joint quality and surface appearance. Clean the tool regularly during use to prevent mortar buildup that can distort joint profiles. No power tools or specialty equipment are required; standard hand-tool safety practices apply.