Antal Barbour Block is a snatch block with a ring head, it provides immediate entry of the sheet and an easy 2:1 control. The cheek plates revolve around the sheave axle allowing the block to open. A safety ball helps the revolving cheek plates from accidental opening, an adjustable screw can set the ball fully in a locked position. The block also has a small becket to attach a line for hanging the block, along with rubber covers to prevent the deck from bumps.