c clamp

Typical listings show throat depths from about 3-1/8 inches up to about 3-7/8 inches. Some light-duty C-clamps list maximum jaw openings around 6-5/8 inches; sizes vary by model.

The trigger-style bar clamps shown list clamping forces ranging roughly from 100 lb up to about 600 lb, with intermediate ratings such as 300 lb also common.

One-handed operation is enabled by a pistol-grip trigger mechanism for fast positioning and incremental tightening, ergonomic plastic handles for comfort, and push-button jaw releases for quick adjustments.

A quick-release C-clamp lets you disengage the spindle faster for quicker adjustments. Listings also highlight durable construction and finishes—examples include drop-forged steel bodies, powder-coated frames, and chrome-plated spindles for strength and rust resistance.

Capacities in these listings range from smaller C-clamp openings (around 6-5/8 inches) up to long bar-clamp capacities of about 36 inches, with common intermediate sizes such as 12 inches.

The listings mention ergonomic plastic handles designed for the trigger action on these clamps.

The example mounting C-clamp is described for truss diameters of about 1.5"–2" and for pipe sizes up to 2", suitable for many small lighting fixtures on those trusses.

The dowel jig’s C-type clamp is described as adapting to sheet or board thicknesses in the range of approximately 15 mm to 30.5 mm.