The Astro 20-ton Welded Bottle Jack, No. AME20 is designed with ribbed steel lifting saddle to prevent slippage. The AME20 offers a longer wear life due to internally machined oil passages, smooth bearing surfaces and close tolerance. With a drop forged welded steel base, this bottle jack includes a welded cylinder with chromed pump piston and ram. The safety oil by-pass system prevents over-extension or damage to the cylinder.Other key features include in-line pump design and no leak "Uni-weld construction."