4. Adjustable length. short version: Measuring range 8-14 inches1. multifunction. Each step gauge consists of two parts that together form a complete tool. Made of stainless steel to last a lifetime. Perfect for installing stair treads, risers and shelves.2. Durable and practical. Made of impact and chemical resistant metal, very durable and reusable. Easy to use. Very easy to adjust the angle and length to meet all needs. Locks securely with 4 buttons. Simple, easy to use and absolutely essential for making cuts and measurements accurately. Multiple Uses: Works great with stairs, risers and shelves etc. Easy to manipulate and adjust to the right angles. Portable and simple. The Stair Tread Template Tool will help you lay out stairs, stairs, risers and shelves to perfection.Features: 1. multipurpose. Each step gauge consists of two parts that together form a complete tool. Made of stainless steel to last a lifetime. Perfect for installing stair treads, risers and shelves.2. Durable and practical. Made of high impact and chemical resistant metal, very durable and reusable. Easy to use. Very easy to adjust the angle and length to meet all needs. Locks securely with 4 buttons. Simple, easy to use and absolutely essential for accurate cuts and measurements.