WPK11A push-type spike hammer WPK11A push-type spike hammer is for cleaning concrete before paving the new ones on highway, high-speed railway, airport, bridge, sparking area. It hammers the surface uniform and rough to make the new concrete more stick to the surface. modelweightblowscapacity/pressurediameter/numworking widthchipping depthbit service lifeWPK11A76kg11/2200 1601.6m3/6kgDIA 31/ 11283mm3-10mm2000-4000m2/set There are hand-type, single/double/three bits-type for choice