All the holes were the same depth. Completely useless as a mounting block. I know they all look different depths in the picture, but as far as I can tell they pressed these brass tubes into holes in the front and drilled the same depth behind each one.
United Scientific Supplies IPB003 Pinning
3 Review
π Insect Display: Enhance Science Education with Acrylic Entomology Specimens
3 Review
πͺ² Phusis Stainless Steel Entomology Pins
3 Review
π¦ Insect Display Case Bug Collection Box: Showcase Your Collection with a Clear Glass Top
3 Review
π Musculoskeletal Anatomy Chart by Palace Learning
3 Review
π§ Enhancing Anatomy Learning: Portable & Detachable Enlarged Anatomical Education Aid for Students
3 Review
π Laminated Anatomical Pack for Skeleton Ligaments
3 Review
𦴠Explore the Intricacies of Human Skeleton with the Movable Skeleton Anatomy Model
3 Review