Adopt aluminum alloy with anodized surface, stable structure, maintenance, sturdy and lightweight, not easily to break or deform, making a practical tool for accurate layout Accurate marking and anti slip: The square bracket adopts a hexagonal plane, with frame that fits more than the and is higher, making the ruler perpendicular to the and making the marking more accurate; In addition, thumb screws can increase friction and slipping, so you don ' t need to worry about clamping and tightening when wearing gloves Kind reminder: The square specification of the fixture frame is suitable for most frame square, rafts, and carpenter blocks with a thickness of less than 8mm Please carefully check this information before placing an order Widely used: Our square frame stairs have a variety of specifications and functions, making ideal for stair rope layout, raft layout, marking repeated angles, and more, making your woodworking and other work efficient Keychain design: Frame tools are equipped with keychains, which can be clamped in places such as belts, work bags, wall hooks, to from being lost and falling, making easily to access when needed, Manufacturer: ZBIianxer