USAGE: Designed for crossbows that shoot up to 350 feet per second (fps). The Nock Out Contender 300 is recommended for high speed crossbows, above 350 fps. WEIGHT: Approximately 31-34 Grains (depends on bushing size); BATTERY: 24 hours (continuous on time). Battery is disposable. EASY OFF: The easiest lighted nock to turn off! With the arrow bolt still in the target, simply pull the nock straight back until you hear a soft "click" and the LED turns off - no tools are required. Practice Mode: The only lighted nock that can be turned off! A simple turn of the silver activation collar deactivates the LED for traveling, 3D tournaments or lightless practice - preserves battery. UNIVERSAL FIT: Perfect gift for the XBow archers! Don’t worry about buying the right size of lighted nocks - there is only ONE package. We include precision bushings to fit the 3 most common carbon bolts - .285", .297" and .300" ID bolts.

Date First Available: April 7, 2015. Best Sellers Rank: #292,757 in Sports & Outdoors. Customer Reviews: 4.1 out of 5 stars 149 ratings 4.1 out of 5 stars. : B00TP87F42. Included Components: ?3 lighted nocks, 3 bushing sets, 3 3.5 v lithium batteries. Part Number: ?69468. Manufacturer: ?Clean-Shot. Color: ?Green. Model Name: ?Nock Out. Brand Name: ?Clean-Shot Archery. Item Weight: ?1 Pounds. Item Dimensions LxWxH: ?5.5 x 0.5 x 3.75 inches. Package Weight: ?0.02 Kilograms. Item Package Dimensions L x W x H: ?5.47 x 3.66 x 0.35 inches.