Indoor use only. I'm selling it because my HS (Head Speed) increased and I saw results. Product Description: This compact swing training gear allows you to train even in small spaces. It features grips of different weights to improve both power and speed. Swinging with the heavier grip will train your swing power. Swinging with the lighter grip will train your swing speed. The 36-inch compact size allows for full swings even in tight spaces. The heavier stick has a D3 balance, so you can train without feeling awkward compared to swinging your own clubs. Swinging with one hand allows you to train both power and direction. Create your own original training routine. Length: Approximately 36 inches Weight: Approximately 680g Shaft: PVC Grip: Elastomer Country of Origin: China Suggested Retail Price: ¥9800 Please take a look at my other listings as well.