A description referring to fig2 and 3 a clamp device indicated generally at 18 includes interlocking straps 19 and 21 hinged to a clamp body 22 at 23 and 24 respectively the body 22 includes posts 26 and 27 having bores 28 and 29 first guide means for receiving a fastener such as a nail 31 the body also includes spaced recesses or voids 32 and 33 portions of which define a v shaped configuration in cross section the bores 28 and 29 intersect the respective voids 32 and 33 at the apices 30 of the v shaped configuration one sidewall 34 of each void defines a guide means second guide means in the forum of a flat planar surface which is tangent to the mating bore in effect the guide means is an extension of a portion of the wall of the adjacent bore thus a nail received in the bore 28 for example is guided along sidewall 34 facilitating entry of the nail into frame member 36 while two posts 26 and 27 are shown it is entirely wherein the spirit and scope of the invention to fabricate the clamp device with a single post one post is fully operative but two posts are desirable when the load is heavy.