Reviewer: N from Greenville, NC 11/03/2008 Bought this device as part of 17 piece set from this site, and it works like a charm. Make sure you have ok vision up close, or get someone you trust and do the watch band sizing with the tool. Every jeweler I went wanted $10 or like $3 per link. This is a no brainer. On the back of watch bands is an arrow, so line up the tool and push the pin with the blue device in the direction of the arrow. You won't go wrong. Does the job fine. BUY THIS.