Toothbrush-style scratch brush with 0.018" Nylon Bristle and an extra long Plywood Handle in a curved design for knuckle protection. The Nylon bristle, hand-laced with stainless steel wire, remains secure even in wet environments if the wooden handle expands or contracts. Hand-laced brushes are the premium brushes in the industry. Each fill tuft is tied into position by hand, resulting in a superior quality brush with maximum fiber retention. Greater bristle density than staple set brushes. This useful brush has a 3 x 7 row configuration, with a 7/16" trim, and a brush face of 1-1/2" x 1/4". Handle length is 14" for a longer reach and 7/16" wide. For a similar brush with a shorter handle see part # 15N.