I was wondering if there are any "pro" coax cable masonry clamps that are more substantial than the kind sold at Radio Shack and the big box home improvement stores. Those type always seemed like a joke to me with their little stubby nail that barely pierces the surface of a cement block wall. One good tug on the cable and they pop right out. The last time I had to fasten coax to a cement block wall I used the Tapcon blue screws and regular one-hole plastic cable clamps. Just wondering if there's a better way.