iM3 Dental Burs – FG (Friction Grip) Plain Round for use in high speed handpieces. Length: 19mm. For removing bone, drilling holes and pulverizing roots. iM3 recommends size 4 for cats and small dogs and size 6 for larger dogs. Packs of 5 burs. Available in sizes: D7910 size 1/4, C9050 size 1, C9080 size 2, C9110 size 4, C9140 size 6 or D7930 size 8.