Gearwrench® 26 Piece SAE Metric Ball End Long Arm Hex Key Set Auto Service Tools; Sets 4mm x 35mm ISL_T1424 4mm x 35mm Stronghand Pipe Alignment Clamp 50 152mm PIPE ALIGNMENT CLAMPS WITH QUICK ACTING LEVER The effiecient wat to accurately fir up round pipes for butt welding Keys made with alloy steel for maximum strength and to resist rotational distortionChamfered edges on both ends help guide the key into the fastener smoothly and quicklyBall end design provides greater access providing better access and speed in all situationsSizes clearly marked on caddy for easy identificationMeets or exceeds ASME standardsIncludes caddies that can be linked together for storage and organization