The slide on this hammer is 1.7 lbs. The complete hammer is 2.75 lbs = 1.25 kg and can be used in 2 different length configurations, 14.4″ or 16.5″ long. Knob on top can be adjusted to change the spring rebound tension. It has a stainless steel slide and chrome aluminum handle. Slide has flat sides so it will not roll. Works with all popular glue tabs.