Internal pipe wrenches are designed to easily remove broken pipe threads, plugs and fittings. Suitable for multiple uses including broken heater hose fittings, household plumbing, to HVAC connections. 16-piece Chrome Vanadium set: 5-piece pin punch: 3/32x4-1/4", 1/8x4-3x4", 5/32x5", 3/16x5-1/4", 1/4x5-3/4"; 5-piece taper punch: 3/32x5-1/4", 1/8x5-3/4", 5/32x6", 3/16x6-1/4", 1/4x6-3/4"; 3-piece cold chisel: 3/8x5-1/2", 1/2x6", 5/8x-1/2"; 2-piece center punch: 1/8x5", 3/16x6"; 1-piece chisel punch gauge. 12-piece Hardened Carbon Steel set: 6-piece cold chisel: 1/2x6-3/4", 5/8x7", 3/4x8", 7/8x10", 1x10"; 4-piece pin punch: 1/8x6", 3/16x10-1/8", 3/8x8", 3/8x10"; 2-piece center punch: 5-3/4" and 7-7/8".