Minimum spread of 5/8" and maximum spread of 8". Use with puller Nos. 1047, 1043 and 939. Weight is only 19 lbs. 12 oz. 1" - 14 thread of tapped hole in adapter. 7-1/8" distance between adjusting screws These versatile accessories feature "knife-like" edges which are easily placed behind the part to secure a gripping surface, even when clearances are extremely limited. When used with an OTC Grip-O-Matic puller, puller jaws grip attachment's outer edge; when used with a Push-Puller, puller legs are threaded into the attachment's two tapped holes.