Makes installing hardwood floors easier Won't damage the flooring Can be used with any floor thickness Always have straight floorboards by bringing crooked planks into place for nailing Easy to use ratcheting mechanism Rack dimensions: 12-5/8" L X 1" W x 5/8" T Rack plate dimensions: 1-7/8" L x 4-5/8" W x 1-1/2" H Lifting plate dimensions: 2" W x 9-1/16: H x 1/4" T Gear diameter: 1" Gear shaft bolt thread: 3/8" x 24 NPT 14 teeth.