Many woodworkers have these easy-to-use, fast-adjusting clamps by the bucketful because they cover such a wide range of situations.
Representing excellent value, they are inexpensive but certainly not cheaply made, constructed with cast iron jaws, steel bars and square-shouldered threads. Nylon jaw caps help prevent marring, and the overmolded handles are easy to grip.
They have a 50mm (2") throat depth and a 20mm (13/16") face width, with a 5mm (3/16") thick by 15mm (9/16") wide bar. Load rating of 170kg (374 lb).
Available in 100mm (4") and 300mm (12") versions.