Designed for permanent installation, these screw-style jacks hold platforms and other equipment in place and stabilize them at the required height. Drill a 1¼" diameter hole through the platform to be leveled and bolt the platform between the upper and lower flanges of the jack's divided housing.  Flanges are 3-3/8" overall diameter, 1/8" thick, and have (6) ¼" diameter mounting holes equally spaced on a 3" diameter hole pattern.  Jacks are made of steel with a polished chrome finish and have an 8½" long handle that folds down when not in use. They stand on a 3-7/8" diameter swivel base that has a slip-resistant rubber pad on the bottom. Screw diameter is 1¼". Lift rate is ¼" per crank revolution.

Minimum Extended Height: 4-1/2"

Maximum Extended Height: 13-1/2"

Overall Height: 18"

Screw Travel: 9"

Net Weight: 11 lbs.