... in Anchor 1. A short anchor,thus a shallow hole,high holding power. 2.Set flush with surface or deeper. drop in ... of concrete,hard natureal stone.2-2. For fastening mediun loads,for example suspended ceiling pipes rails,channels,panels,brackets etc ... ,thus a shallow hole,high holding power.2-2. Set flush with surface or deeper.3.-3 Fire resistan High Quality drop in anchor