Two-Sided Mechanic's Hammer.The Hammer is a professional quality, efficient, mechanic's hammer perfect for the tool box or shop, and ready to tackle all your bicycle hammering needs. The Hammer features two-sided, heat treated tool steel head with a replaceable plastic face on one side (Spare part: 38500635).It features a compact 10.75'' (275mm) length, 550g weight, and Dice Grip handle for comfort, control, and vibration absorption. The Hammer head diameter is 1 inch (25.4mm) and the soft face tapers down to about 24mm.Compact size and low weight perfect for the tool box.Two-sided, heat-treated tool steel head with replaceable plastic face on one side.Dice Grip handle provides comfort and control while absorbing vibration.Material CompositionStainless Steel, Plastic & Rubber