@jacqueslees: Hook Head Spikes (Dog Spikes) & Boat Spikes Our company manufactures and supplies hook head spikes (also known as dog spikes / rail spikes / track spikes) and boat spikes in accordance with DIN, GOST, AREMA, GB and TB standards. These products are primarily made of low carbon steel (mild steel). Main sizes of AREMA standard hook head spikes: · 3/8" × 3" · 3/8" × 3-1/2" · 1/2" × 4-1/2" · 5/8" × 5-1/2" · 5/8" × 6" Main sizes of boat spikes: · 3/8" × 6" · 3/8" × 8" · 3/8" × 10" · 1/2" × 10" · 1/2" × 12" Other sizes and specifications are available upon request.