Bosch RN175 Roofing Coil Nailer Bosch Armour - Protects from jobsite abuse and abrasive shingles Tool-less adjustable depth of drive Dry Fire Lock-Out - Avoids damage to work materials and internal components by preventing blank firing Tool-less Adjustable Shingle Guide - Enables user to change exposure dimension for different shingle types Single Action Side Load - One step Nail re-load