This model is a housing for a low voltage protection module used in battery powered projects to keep the batteries from being overdrawn. The lid is to be super glued on once the module is installed. This print require heat press inserts for attaching the module as well as 3mm bolts. Links for all below. Amazon Link for LVP Module: https://www.amazon.com/dp/B07QNXM4LS?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2 Heat Press Inserts: https://www.amazon.com/dp/B08P1S1255?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1 M3 Stainless Hardware: https://www.amazon.com/dp/B0BMQFHDBH?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1