NO MORE GUESSWORK: it shows key temperatures for boiling sugar (hard crack, soft ball, etc.), as well as jam making. HEAT PROOF: you can even use it as an oil thermometer for deep frying - the robust glass and stainless steel won't melt in hot pans. STAY SAFE: it also has a built in pan clip, so you can secure it to your pan and avoid hot spills. USEFUL INFO: this sugar / jam thermometer measures from 60C (140F) to 200C (392F); 100% mercury free; 12 month guarantee.