Most hitting mats shift on impact with every swing. Even a rubber backing doesn't prevent this. The ProStrike's patent pending design integrates an internal 11.5 lb steel plate to provide true mass-based stability between swings. This internal weight keeps the mat fixed in position shot after shot. FEATURES Zero-Shift Design - patent-pending internal 11.5 lb steel plate combined with a textured rubber base delivers mass-based stability to prevent mat movement during practice. Integrated Tee Holder - switch seamlessly between tee shots and turf practice. Durable Hitting Surface - wear-resistant layer designed for repeated practice sessions. Portable Design - integrated carry handle for easy transport. Dimensions - 24" (L) x 12" (W) x .55" (H) ; 11.5 lb