A very useful pair of clamps for attaching a wooden sub-fence to your circular saw or bandsaw. The clever design allows you to drill an 8.5mm hole in the top of your fence and the clamp holds the fence securely in place leaving the face free from obstruction. The unique clamping action could be useful for many other jig type applications where the top surface needs to be free from obstructions. The main body is 16mm square section anodised aluminium, and the round steel bar 7mm diameter. The clamping screw is 80mm long giving the clamp a maximum capacity of a little over 150mm, with a throat depth of 38mm.