The STINGER CH38A Autofeed Cap Hammer is designed for those who prefer an economical, non-pneumatic solution for delivering the holding power of a cap and staple with the speed and ease of a hammer tacker. They deliver best practice installation of residential roofing felt, housewrap, and rolled insulation, and get the job done for a fraction of the cost of a pneumatic cap stapler without the additional hassle and expense of a hose, compressor, and power requirements. The STINGER CH38A Autofeed Cap Hammer has an advanced autofeed feature that doesn't require a trigger, with every swing, the CH38A automatically advances the cap and positions it for the staple.