Updated version April 2025- will fit CAP and other smooth thread dumbbell handles . 2 threaded end caps for standard 1.00" inch thread adjustable dumbbells . Screw on and save your thighs from uncomfortable awkward dumbbell position when going to incline/bench and or shoulder press with adjustable dumbbells! Can handle up to 100lbs(+) safely .Each one tested before shipped. For controlled movements from thigh/top of knee . Do not drop. DO NOT LET THE CAP HIT THE FLOOR WHEN ATTACHED TO THE DUMBBELL. It will break. Lay your dumbbells flat.. Please make sure you have a inch of thread remaining past your plates to ensure you can screw the cap all the way on for it to grip properly.