Review on Get Precise Measurements With GemRed XLB Digital Angle Gauge Level (82412-XLB Angle Gauge With Level Vial) by Mark Bishop

Good little tool for helping learn what the degree of slope feels like under your feet when learning aimpoint for putting. My golf instructor used a 12" level with a digital readout to teach me the aimpoint method and I originally got one of those. That worked fine but was too big for my taste. These things are nice and small, will easily fit in your pocket and seem to work fine. Only problem with these type of tools is you have to bend down in front of them to see the readout. You really have to have one of these to learn what the degrees feel like. It's impossible to guess what 2 degrees feels like without actually knowing it's 2 degrees and then adjusting your "feel" to what the tool tells you.