ITEM NAME:110XL 55 Teeth Geared Timing Belt fit for Sander Black Decker 429964-3 0.3" Hf 55 Teeth Timing Belt 110XL031 Replacement fit for Sander Black Decker 429964-3 SPECIFICATIONS.(Compatible With: fit for black decker 429964-3. Number of Teeth: 55. Pitch: approx. Item included: 1 x timing belt. Belt Section: XL. Style: XL series belt positive drive. Color: Black. 3) Easy installation.