10 Pieces includes:

Aluminum Oxide

RA1M 1/8" Head Diameter, 1/4" Head Length

RA3M 3/32" Head Diameter, 9/32" Head Length

RA11M 1/4" Head Diameter, 7/64" Head Length

RA12M 3/16" Head Diameter, 3/16" Head Length

RA21M 1/4" Head Diameter, 5/16" Head Length

Silicon Carbide

RA31M 1/8" Head Diameter, 1/4" Head Length

RA33M 3/32" Head Diameter, 9/32" Head Length

RA41M 1/4" Head Diameter, 7/64" Head Length

RA42M 3/16" Head Diameter, 3/16" Head Length

RA51M 1/4" Head Diameter, 5/16" Head Length

Midget Latch Type - Special latch type shanks for the Foredom miniature angle handpieces 57A & 57D.  3/32" shanks.