@jacqueslees: Railway Dog Spikes (Hook Head Spikes) & Boat Spikes Our company manufactures and supplies dog spikes (also known as hook head spikes / rail spikes / track spikes) and boat spikes in accordance with DIN, GOST, AREMA, GB and TB standards. These products are mainly made of low carbon steel (mild steel). Main sizes of AREMA standard dog 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.