Tongue-and-groove pliers Knipex 87 21 250

The Knipex 87 21 250 tongue-and-groove pliers combine the proven gripping and turning capabilities of Knipex Cobra pliers with an additional QuickSet push-on function that simplifies work in confined and hard-to-reach spaces. Adjustment on the workpiece is possible by sliding the handle; once the hinge bolt locks under load the gripping width is fixed and can only be changed by pressing the release button. To reactivate the QuickSet function the hinge bolt must be released with the button and the pliers fully opened once.

Advantages

The QuickSet push-on mechanism enables single-handed, on‑workpiece adjustment for rapid repositioning in tight spaces. The self-locking hinge bolt secures the chosen jaw opening under load, preventing accidental slipping. With a 250 mm length and a lightweight 335 g construction, these pliers offer good handling for plumbing and mechanical tasks while maintaining durable Knipex build quality.

Suitable for

• Gripping and turning pipes and fittings up to 50 mm diameter
• Holding and turning nuts up to approx. 46 mm
• Plumbing, HVAC and general mechanical maintenance
• Work in confined or hard-to-reach areas where quick on‑workpiece adjustment is needed

Key specifications

• Brand: Knipex
• Model / MPN: 87 21 250
• EAN: 4003773072775
• Tool type: Tongue-and-groove pliers (Cobra style) with QuickSet function
• Length: 250 mm
• Weight: 335 g
• Max. pipe diameter: 50 mm
• Approx. nut size capacity: 46 mm

How to use

Place the pliers on the workpiece and slide the handle to set the gripping width directly on the pipe or nut. Apply load so the hinge bolt locks into position; the gripping width remains fixed under load. To change the setting, press the release button, open the pliers fully once to reset the mechanism, then slide the handle to the new position and reapply load.

Usage recommendations

Use the pliers only for appropriate gripping and turning tasks within the stated capacity limits. Release the hinge bolt by pressing the button and fully open the pliers when switching positions to ensure reliable activation of the QuickSet function. Avoid excessive sideways forces on the jaws to prevent wear.