All Our Tools MADE IN USA!Seven(7) piece set installs piston rings from 2-7/8-in. to 4-3/8-in.(73mm to111mm). Works both vertically and horizontally. Set includes fine tooth ratcheting pliers for accurate compression and 6 interchangeable bands. Interchangeable Bands: No. 641-1 Band Size 2-7/8-in. to 3-1/8-in. No. 641-2 Band Size 3-1/8-in. to 3-3/8-in. No. 641-3 Band Size 3-3/8-in. to 3-5/8-in. No. 641-4 Band Size 3-5/8-in. to 3-7/8-in. No. 641-5 Band Size 3-7/8-in. to 4-1/8-in. No. 641-6 Band Size 4-1/8-in. to 4-3/8-in. Band Width: 1-1/2″ Each