Gets cold in seconds. Great for injuries where you have swelling. Easy to use just pop the pouch on the inside to get instant cold. Packages in an easy to carry box like toting a lunchbox. Great item to have at any and all sporting events and as a general first aid kit item. Features Coldmax Coaches Instant Cold Pack Pack of 10Specifications Dimension: 0.1 x 0.1 x 0.1 in. Applications: Wood Arbor Size: 5/8 In. Blade Diameter: 7-1/4 In. Blade Material: Carbide Blade Type: Trim/Finish Color: Black Contained Battery Type: Lithium Ion Contains Batteries: Y For Use With: Circular Saw Hook Angle: 15 Degree Kerf: 1.8 mm Machine Use: Circular Saw Material Cut: Wood Material: UC2 Carbide Maximum Speed: 8 300 rpm Number Of Teeth: 40 tooth Recommended Use: Pistol Teeth: 40 tooth/ATB Tooth Count: 40-Tooth Weight: 0.52 lbs - SKU: WLLCH7111