The first number represents the diameter of the tap in millimeters
Square and Phillips bits are forged rather than milled
non-stick perma-shield permanent coating prevents gumming & corrosion
a Function Basic Helmet System
Pitch & Slope Locator
PEX Quick Connect Coupling, 1/2 x 1/4-In. Category_Roof Venting & Fans The first number represents the1 2" x 1 4", quick connect coupling, hold up to 250 psi, 1 piece, no parts to assemble or lose, quick connect design allows quick & easy connections without the use of installation tools, great for new installations or plumbing repair projects for pex, copper, & cpvc pipe, just cut pipe & push pex, copper or cpvc tubing into fitting end until tubing seats at stop, can be disconnected by pulling back on ring & releasing pipe, code approved for behind