Gedore Recoilless Nylon Tip Hammer with 40mm Tips - this is Gedore's premium hammer in their 248 series.  Comparable to the considerably more expensive Facom 212A series (better in my opinion).  Also the Facom hammers are now made in Taiwan (the Gedore hammers are made in Austria). Features include....

• Almost unbreakable fibreglass hammer handle with plastic grip and secure head
• Splinter-proof, shatter-proof, and wear-resistant polyamide heads, 75 Shore D, tested to -20° C
• Powder coated with silver hammer-effect enamel
• Weight = 780gr (1.7 lbs)
• Length = 315mm (12.4")
• Replacement heads (tips) are available (1-4 week lead time) (part # E 248-40)
• Made in Austria
• US warranty

I currently stock the 30mm and 40mm tip size hammers in this series. See comp photo. 

The Gedore 248 F-40 (factory code 8867850) is a professional recoilless soft-face dead-blow hammer featuring a 40 mm head diameter. Shifting up from the smaller 30 mm version, this model provides a broader striking surface and greater kinetic mass (780 g), making it perfect for heavy-duty alignment, machinery assembly, and automotive chassis work where you cannot risk marring or denting the component surface. The head housing contains steel shot that acts as a counterweight during impact, eliminating rebound, dampening recoil shock to your wrist, and transmitting maximum kinetic energy directly into the workpiece. 

• Head Diameter: 40 mm
• Total Tool Length: 315 mm
• Net Tool Weight: 780 g (approx. 1.72 lbs)
• Face Striking Material: Splinter-proof, shatter-proof, and highly wear-resistant Polyamide (PA)
• Face Hardness: 75 Shore D (shatter-tested down to -20° C)
• Shaft & Handle Construction: Virtually unbreakable, vibration-absorbing tubular fiberglass handle coupled with an ergonomic, non-slip plastic grip.
• Housing Protection: Impact powder-coated finish with a classic silver hammer-effect enamel.