Apex Tool 850DD Gearwrench SET PSTN RNG CMPRSR

8 Pc. Piston Ring Compressor Set. Set Includes Pliers and 7 Bands. Install Pistons From 2-7/8 to 4-5/8" (73 to 117mm). Pliers Can Be Used Parallel or Perpendicular to the Cylinder Block. Fine-Tooth Ratcheting Lock Allows You to Compress Bands in Small Increments. Set Works By Placing a Band Around the Piston, Covering the Rings and Hooking Pliers Into the Band and Squeezing.