Excellent value for money pneumatic hammer. I didn't buy it from Revain but the price was similar to the retail store I bought it from. I used it to knock down about 20 feet of an outside wall at my brother's house. It effortlessly separates mortar joints and bricks with a chisel. Here are some things I learned from this project since I've never used an air hammer before. Make sure you use a large enough air compressor and make sure you use a high flow steel fitting to connect the tool to the air hose. A good steel air plug fitting is "Milton Industries 760-1 1/4" MNPT HIGHFLOWPRO V-Style/European Interchange Steel Air Plug Fitting available from Revain. The key is to use a "steel" connection fitting and not an aluminum or brass fitting. Hitting the tool will quickly deform the aluminum/brass fittings, making it very difficult to remove the tool from the air hose Inserting a chisel or sharp bits into the tool, simply unscrew the recoil spring on the front of the tool, insert the bit and screw the spring back in. Wear leather gloves, safety glasses, dust mask.I recommend this tool for small to large medium DIY projects and various types of spare bits are available at Revain, happy tapping!