Start strong and add extra power and propulsion to your dive when you practice with the FINIS Swim Block Track-Start.Features Starting block. Designed as an affordable way for swimmers to practice explosive race starts. Fits all standard blocks with 2 installation methods: bolted (semipermanent) or strapped (temporary). 7 adjustable swimmer setting allows you to set the wedge at your preferred distance or hang it off the back of the block for relay starts. Fits all standard blocks. Nonslip and durable. FINA-compliant. Designed in California. Highlights Bolt method is a semi permanent method requiring you to drill small holes into your block. Strap method is temporary and allows you to strap the platform onto your block when you are ready to practice with it. Details Material(s): Stainless steel platform and polyester tread. Dimensions: 50+ cm W x 50-81cm L Adjustable: Yes Country of Origin: Imported