The Bowmaster Portable Bow Press fits in the palm of your hand and weighs just 3/4 lb., yet has all the capabilities of a full size bow press. This durable tool can really save the day, allowing you to replace strings or cables, install peep sights, adjust draw length and more. All metal construction Jackscrew: The unique patented jackscrew design gives the Bowmaster a wide range of adjustment. The jackscrew is infinitely adjustable over it's range giving the precise amount of compression needed for each job. The Bowmaster's long range of pull not only permits the replacement of a damaged or worn bowstring but also the replacement of a broken bowstring. In fact, with the Bowmaster you can perform any repair that can be performed with a full size bench mounted bow press and yet the Bowmaster can do something they can't.....it can fit in your pocket!