Filter the range by brand, price, stock and rating, then add candidates to Compare to weigh them side by side on capacity, drive size, torque and finish. Every product page lists similar items from other brands, so you can line up a Sealey tool against the Draper or Sykes Pickavant equivalent, and where a tool comes in several sizes or ratings the variants are selectable on the product page, where compatible accessories are also listed. If you still aren't sure a tool suits the job, use Ask Simon on any product page to put your question to a product expert before you buy.
Match the rating to the vehicle's gross weight, not kerb weight. Cars and light vans take a 2-tonne trolley jack with 3-tonne axle stands. 4x4s and transit-size vans take a 3-tonne jack with 6-tonne stands. HGV, agricultural and plant work needs 10-tonne-plus bottle or air jacks. Always support a raised vehicle on axle stands rated for the load before working underneath.