Bon Tool JAG Clamp XL Masonry Line Stretcher Pair (21-291)

Designed for masonry professionals, the Bon Tool JAG Clamp XL Masonry Line Stretcher is the robust, adjustable line‑stretching tool you reach for when laying long, straight courses. The JAG:XL is an adjustable hand clamp line stretcher with an attachable size adjuster (sold in pairs) and is built to fit the same blocks as the original JagClamp, with additional range to maximise versatility. When you need reliable grip, fast course changes, and precise line placement, this pair of JAG XL clamps is ready to perform.

Key benefits

• Secure gripping power that stays put on brick, block, fencing, and more
• String notch designed to hold the line securely in place, reducing slippage
• Quick course changes keep your workflow moving without reworking alignment
• Adjustable opening from 5/8" to 5-1/2" to accommodate a wide range of block sizes
• Includes a pair of clamps, ready to use in tandem for longer runs

Product details and scope

The JAG XL is specifically engineered as an adjustable line stretcher for masonry projects. It fits on brick, block, fencing, and similar substrates, offering versatility across various job sites. The system supports easy additions with an attachable size adjuster (sold in pairs) to tailor the grip to your exact course requirements.

Ideal use cases

• Bricklaying and blockwork where precise line alignment matters for uniform courses
• Fencing installations requiring straight, taut lines for post placement
• Long masonry runs where faster setup and stable line tension improve productivity and safety

Included in the pair

• Two JAG XL clamps (sold as a pair)
• Attachable size adjuster (sold in pairs) to fine-tune the opening as you work

Why customers choose JAG Clamp XL

With a track record of dependable performance and a design focused on practical field use, the JAG XL helps bricklayers maintain accurate line placement while speeding up course changes. It’s a purpose built tool for masonry workflows where consistent line tension and stable alignment translate to cleaner joints and smoother installs.