This is a pack of ten replacement Tekno RC M4 Lock Nuts, and are intended for use with the Tekno R/C EB48 electric 1/8 buggy. These nuts are used to secure the shock standoff's to the front and rear shock towers. This item fits the following: Tekno RC EB48 Tekno RC EB48.2 Tekno RC EB48.3 Tekno RC EB48.4 Tekno RC EB48SL Tekno RC ET48 Tekno RC ET48.3 Tekno RC NB48 Tekno RC NB48.3 Tekno RC NB48.4 Tekno RC NT48 Tekno RC NT48.3 Tekno RC SCT410