The Big Bat System consists of one 12" master bat and ten 8.5" inserts. The master bat in this set is carved from formaldehyde-free 3/4" Medex brand HMR MDF.

Bat pin holes are 3/8 (10mm) diameter and spaced 10" apart to fit most standard throwing wheels.Inserts fit snugly in the bathole and a finger recess helps lift the insert holding your creation from the master bat.

About HMR: Please note that these are a full 3/4" thick and more warp resistant than a 1/2" thick bat. HMR (High Moisture Resistant) MDF is a fiberboard material made with formaldehyde-free adhesive and woodfiber. HMR MDF (Medex) is much more resistant to water and moisture than regular MDF and will be less likely to warp if abused. This bat also has good clay adhesion and will last a long time if given proper care and storage.

Caring for your batts: Batts will last almost indefinitely if well maintained. For best results, sponge a little water onto dry, porous bats before use, but don't let them become water logged. Scrape off clay before it dries to avoid creating a lot of dust, and store batts on edge to avoid trapping moisture.