This new base pad is designed to give you the edge over the competition. Patented proven push pin design Super easy to attach and detach from the magazine No specialty tools or devices required to disassemble One piece design, no extra parts to possibly lose during disassembly Fits the USPSA, IPSC, and IDPA boxes USPSA Production and IDPA Legal Holds 18+1 rounds of 40S&W in the Glock 22/35 Holds 21+1 rounds of 9mm in the Glock 17/34 Holds 18+1 rounds of 9mm in the Glock 19 Easy to reload into the gun with a full mag Adds weight to magazine so mags drop free easier for faster reloads CNC machined from billet alum Mfg: Taran Tactical Innovations