With a jaw opening of 4 in., the BESSEY XV5-100 Spring Clamp is designed to clamp materials firmly and securely. The spring clamp has an anti slip, soft handle for comfort and ease of use. Its jaw opening measures 4 in. and it has a length of 6 1/2 in.. It is made from high impact plastic, which makes it both durable and lightweight. If you are looking for a reliable spring clamp that will hold your work pieces together, this Bessey product is the one to choose.