The Stanley Heavy-Duty Corner Clamp has an articulating design that allows for pieces of equal or varying thickness to be joined at right angles. Its reversible head design means it can be used as a parallel clamp. The heavy-duty cast zinc construction provides increased durability. Whilst comfort and maximum torque is achieved via the bi-material tri-lobular handle. Mounting holes allow clamp to be securely attached to work surfaces. Specification Throat Depth: 30mm.Clamping Capacity: 57mm.Weight: 1010g.