Cosyonall Professional T-Shaped Hair Clipper/Trimmer Standard Replacement Blade Set #2215-Compatible with Sterling Stylist and Sterling 5–Includes screws & cam follower (Gold);

How to Replace 2-Hole Trimmer Blades?

Remove old blade set by removing both screws

1.Position new blade set on Trimmer, place small bump on cam follower

2.Into center hole of large blade

3.Holding blade set in place, replace and tighten screws

4.Turn Trimmer "ON".  Check for proper back-and-forth blade motion

Warm Tips:

If blades do not operate properly, loosen screws slightly and re-check alignment.

Re-tighten screws and try again.

More details can search Whal T-shaped Blades installation on Youtube.