Barrel shape Gold carbide, good for smoothing and shaping the top surface of gel and wraps. Comes in either small or big head. Depending on the application, two different stem sizes are available: Made in U.S.A * 1/8" - for use with Dremel 257 and 332 drills. * 3/32" - for use with UP 200/220 and VIP 2000/3000/4000 drills..