RM Medium Handle Rollers have a rolling design face that is 3 cm (1.2 inch) across. MKM Medium Handle Rollers are beautifully carved, have unique designs, release well, and have a smooth carved texture. RM Rollers are made from wood and finished with tung oil to ensure durability for many years of use. All MKM tools are easily cleaned with water and a soft toothbrush. MKM RM Rollers are best rolled with the RH-1 Handle. The RH-1 splits apart to facilitate inserting a different RL, RM, or RS Roller. One RH-1 is all you need to use for any RL, RM, or RS roller. The RH-1 and rollers are sold separately.