Manufacturing Co. Shore Holder, 3/16" Steel Cup for Attaching Shores to 4x4 or 4x6 Joists, Secure with Duplex Nails, 4x4 Cup Type

HEAVY-DUTY LEVELING JACK FOR 4X4 POSTS - Engineered to support up to 15,000 lbs, this steel screw jack stabilizes beams, levels joists, and reinforces crawl spaces. Constructed for demanding structural repairs, it delivers strength, stability, and durability for residential and commercial uses. ADJUSTABLE & VERSATILE SUPPORT - Easily attaches to 4x4 nominal lumber with a 6-inch adjustment range for precise leveling. Operates like a lally column for structural reinforcement, making it excellent for trench shoring, construction, and foundation repair projects. SECURE & DURABLE CONSTRUCTION - Fabricated from high-carbon steel with a corrosion-resistant finish, this 4x4 jack provides long-term stability in harsh conditions. An integrated safety lock offers additional security, making it appropriate for both permanent and temporary support. PRODUCT SPECS & MATERIALS - Weighs 12 lbs with a maximum load capacity of 15,000 lbs. Features a 6-inch adjustment range using a 1.25-inch Acme threaded screw, independent swivel base plates with 4-5/16" diameter holes, and a lock-set screw for stable support