Heavy Gauge Thick BCR Ring - Screw On Ball - 15mm Thick
Heavy gauge ball closure ring.
15mm thick - 20mm internal diameter - 19mm ball
The screw on ball means these can be opened by hand.
The bar length is the internal diameter of the ring. You do not measure the outside as this is not considered the wearable area.
Please note these are VERY heavy as they're solid steel.