Ameristep Grizzly Tree Step 8 Pack. 8 pack of large screw in tree steps2 inch thread length to assure sturdiness. Self-tapping screw in point Large 6 inch step area. Solid alternative to more expensive tree steps and ladders. 8 pack should allow you to get 12 feet. Grizzly Tree Step 8 Pack, Thread Length Of 2inch, Largest Step Available At 6 inch, 8 Pack Clamshell, Brand: Ameristep Ameristep AM-AMEAC0101 Grizzly Tree Step 8 Pack. Thread length of 2". Largest step available at 6". 8 pack clamshell. Condition is "New". Shipped with USPS Priority Mail.