The Roof Snake makes replacing composition shingles safer, easier and more accurate than traditional methods. Single nail puller claw removes nails easily from roof shingles. Offset nail-slot feature helps align roofing nails with the proper one inch offset from the bottom edges of the existing course. Replace and install 3-tab shingles without over-bending or striking surrounding shingles with the hammer. 4 In. W x 1 In. H x 13 In. L