17-1/2-Ton Capacity Push-Puller Features 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.. Max. Spread 9 Min. Spread 1/2 Thread of tapped holes in adapter 5/8-18 Distance between adjusting screws 6 Use with puller Nos. 1035, 1040, 1041, 1042, 1065, 1063, and 938 1130 Yes - NICKEL COMPOUNDS