A while back a friend gave me a bench block that was 3d printed it broke so I made my own version used 3 Shells and 20% infill
4 holes 3/4"(19.05mm)- 5/8"(15.875mm)- 1/4"(6.35mm) - 3/16"
1 Cut 1/4" (6.35mm) x 1"(25mm)
1"(25mm) Height