+1 If you are using the rented tool, you just turn it clockwise. You have to constantly tighten up the tool because the caliper collaspes faster than the tool expands. You need to turn it all the way in. Until it won't go any farther. You will not be able to fit it over the new pads is you don't.
ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370.
USAF 1969-1996: Vietnam veteran. Aircraft maintenance. ICBM Operations. Research & Development.
Also own: 1997 Harley FXDWG, 1998 F-150, and 2002 Corvette LS1