Model 141 Manual Receding Geared Threader Pipe Dies, 2 1 2 in to 4 in 8 TPI, HS RH no checkout Use for heavy duty welding Part Use for heavy duty welding Part number displayed on exterior surface Hoists provide safety and durability in light to medium duty industrial applications Patented Brake Ware indicator lets you know when to replace the friction disks Smaller body and lightweight design for low headroom applications and use in confined areas Double pawl design splits the load to opposite sides of the ratchet gear Industrial rated alloy steel hooks rotate 360 degrees High Speed (HS) RH (NPSM) National Pipe Straight Mechanical Use (NPT) Dies and Rotate Threader Guide Post 180° (BSPP) British Standard Pipe Parallel Use (BSPT) Dies and Rotate Threader Guide Post 180° requires BSPT threader Options available for cast iron and stainless steel