Minimum spread of 1/2" and maximum spread of 9". Use with puller Nos. 1035, 1040, 1041, 1042, 1065,1063 and 938. Weight is only 12 lbs. 9 oz. 5/8" - 18 thread of tapped hole in adapter. 6" 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.