Heavy Duty Jack        Features         2,500 lb (1135 Kg) capacity.     Strut tension plate for superior lateral support.     1" square tube base construction.     Built for heavy use & abuse.     Quick action lockwasher for fast height positioning.     Patented Fall Guard™ feature allows 1" (25 mm) safety zone around lockwasher.      1-1/2" (38 mm) Acme fine adjustment thread – the largest in the industry.      Large, convenient adjustment handle.      Set screw for double margin of safety.      Set screw can lock jack head to stand for transportation – no loose pieces.      Jack independently load tested for quality assurance.      CE rated.      Backed by over thirty years of jack stand manufacturing experience. Product Models and Specs – Heavy Duty Jack Heavy Duty - Hi Jack Part No. Description. Weight Lb. Kg. 780375 ST-801 w/Vee-Head 23.0 10.4 780376 ST-802 w/Roller Head 26.0 11.8 780377 ST-803 w/Bar Stock Head 21.0 9.5 780378 ST-804 w/Stainless Steel Rollers 26.0 11.8 780379 ST-805 w/Stainless Steel Vee-Head 24.0 10.9 780380 ST-806 w/Ball Transfer Head 30.0 13.6 780381 ST-807 w/Rubber Wheels 25.0 11.3 Heavy Duty -Loi Jack Part No. Description. Weight Lb. Kg. 780385 ST-901 w/Vee-Head 19.0 8.6 780386 ST-902 w/Roller Head 22.0 10.0 780387 ST-903 w/Bar Stock Head 18.0 8.2 780388 ST-904 w/Stainless Steel Rollers 22.0 10.0 780389 ST-905 w/Stainless Steel Vee-Head 20.0 9.1 780390 ST-906 w/Ball Transfer Head 26.0 11.8 780391 ST-907 w/Rubber Wheels 21.0 9.5