Precision tools a veteran’s co-op makes the OFFICIAL STIMPMETER. Now you can get a professional stimpmeter from PRECISION TOOLS INC. (MADE BY VETERANS) The Stimpmeter is a device used by the USGA, PGA, LPGA & amateurs to measure the speed of a golf course putting green by applying a known force to a golf ball and measuring the distance traveled in feet. The device is emerald green, solid hard wood, one piece construction, 36 inches long and 1.50" wide, with a 45° v-shaped groove extending along its entire length. It is tapered at one end, to reduce the bounce of the ball as it rolls onto the green. It has a notch at a right angle to the length of the bar 30 inches from the lower tapered end where the ball is placed. The ball is pulled out of the PRECISIONED notch by gravity when the device is slowly raised to an angle of 20°, rolling onto the green at a repeatable velocity. The distance traveled by the ball in feet is the 'speed' of the putting green. Six distances, three in each of two opposite directions, should be averaged on a flat section of the putting green. The three balls in each direction must be within 8 inches of each other for USGA validation of the test. Easy to use. . Will last a lifetime. Take the stimpmeter with you to various golf courses to check the speed of their greens. Learn how to adjust your shots based upon the speed of different greens. EASY TO USE. Will last a lifetime. A MUST-HAVE FOR ANY SHOP OR GOLFER.. INSTRUCTIONS & SPEED SPECIFICATIONS FOR - STANDARD AND U.S. OPEN, INCLUDED WITH PURCHASE. WE HAVE ONLY HAD POSITIVE FEEDBACK, MONEY BACK IF NOT COMPLETELY SATISFIED.