Every new Sinclair Rest comes with a post, but if you are planning to use more than one top on your rest, order a post for each additional top. Our rest post is stainless steel and precision machined threads and a one fourth - twenty hole for the top mounting screw. These posts are machined specifically for Sinclair Rifle Rest, but will usually fit Hart handwheels also. Only fits the lite weight rest and Gen I Varmint, Does not fit Gen II Rest. Post is 4 inches long, undersized to three fourths - ten thread. Mfg: Sinclair International