The GGT-02 consists of 3 parts, a base insert and 2 tools. 

TangoDown is pleased to release the Vickers Tactical grip tool for Gen4/5 Glock’s, the GGT-02.

Possessing all of the features of the original GGT-01 Gen3 grip tool, the GGT-02 allows the use of Gen4/5 factory Glock pistol frame back straps.

One is for use WITH the back straps, and one is for use WITHOUT.  Installation is THAT simple and secure.