Andoer Pistol Grip Ball Head with 1/4" Screw Quick Release Plate for Canon Nikon Pentax DSLRs Tripods Monopods 100% brand new Compact and convenient trigger-style tactical ballhead. Can be used with tripods or monopods that have either a 1/4"or a 3/8" threaded center column post. Trigger control for the fastest, surest way to set up your camera. Search EverTrust for more choices!