Easy-to-grab knurled ring eliminates fumbling for a wrench and makes between-station tube changes a whole lot easier. Knurl diameter is small enough so tubes fit most over/unders and side-by-sides. LEAD SHOT ONLY! Not For Steel Shot!
SPECS:
Stainless steel. 12 gauge only. Knurl is 1/4" long x .88" diameter (approximate). Threads are as follows - Berretta 12 (plus Benelli M1 and Super 90), .810"-1mm.