This Belted Magnum Collet Resizing Die allows you to get much longer life from your cases.   You can now reload your cases up to 20 times each and be sure that they will chamber properly.   Unlike ordinary sizing dies, this die uses a collet to eliminate the case bulge just above the belt.   One die fits all belted magnums (except .224, .240, .378 and .460 Weatherby) no extra collets to buy.