The Senco 21-Gauge 2" Pneumatic FinishPro 21LXP 21 Micro Pinner with Case (8M0001N) is an industrial strength slight/medium head pinner that fills the need left between 18 gauge brad nails and 23 gauge micro pins. The 21 gauge pins offer significant holding power while leaving a much smaller indent than an 18 gauge brad. This lightweight Micro Pinner is the perfect tool for all of your intricate finish and trim remodeling projects. The micro pins fasten the smallest of decorative trim securely and leave a nearly invisible hole - no splitting or puttying. The FinishPro 21 drives 5/8" - 2" 21 gauge micro pins.