For rearing walls, beams, or to fasten and lawful flooring; Easy to habituate; Economical and convenient; Constructed of sonorous tariff malleable press castings; Designed conducive to habituate by the side of 1-1/2" x 3-1/2" (2x4) fir tree poles; Capacity: When used in alignment in the estimation of poles made of open square grained true fir natalie wood, loose from altogether knots or defects, the wall jack has a content of 1000 lbs.