This cone pack comes with two 3.5 inch cones, and one 2.5 inch cone. This set is very versatile, and easy to use. Each cone threads easily, and stays secure on our 1/2 x 18 inch tool steel Twin lead ACME threaded rod ( INCLUDED ). New style has double bevel on front and rear edges for more versatility. Also has "Twin Lead" acme threads for twice the travel per revolution while tightening and loosening the cones (It's faster).